JP2008079058A - Amplification apparatus for reception of tv with built-in interference signal removing filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid reception of disturbance by a signal of a cellular phone in order to save energy. <P>SOLUTION: This amplification apparatus is provided with a filter circuit which passes through a desired signal of a determined band from a signal of a first band and simultaneously removes a disturbing wave signal, a first signal-power source passing circuit which passes through the signal of the first band and supply voltage and a selection means for selectively performing output via either circuit of the filter circuit or the first signal-power source passing circuit at either place on a transmission path on the input side from a last stage amplifier of the amplification circuits which amplify the signal of the first band. Then, when the selection means is selected as the first signal-power source passing circuit, the supply voltage is supplied to an amplifier circuit which amplifies a signal of the second band via the selection means and when the selection means is selected as the filter circuit, the supply voltage is not supplied to the amplifier circuit which amplifies the signal of the second band. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は，主に家庭用あるいは共同受信用に利用されるＴＶ信号を増幅するテレビ受信用増幅装置に関し，詳しくはその回路構成に関する。   The present invention relates to an amplifying apparatus for TV reception that amplifies a TV signal mainly used for home use or joint reception, and more particularly to its circuit configuration.

携帯電話の普及に伴うサービスエリアの拡充のため，ビルや集合住宅の屋上や柱上などに，携帯電話の基地局が数多く設置されている。この基地局からは携帯電話用に認可された周波数帯の電波が放射されるのであるが，そのうちの８００ＭＨｚ帯（例えば８１０から８１７ＭＨや８７０から８８５ＭＨｚ）の電波を使っているものはＵＨＦ帯のテレビ信号（４７０から７７０ＭＨｚ）のすぐ上側の周波数帯域であり，しかもテレビ信号に比べ非常に強いレベルであるため，ＵＨＦ帯のテレビ信号の妨害波となる場合がある。
つまり，テレビ受信システム等に設置されたＵＨＦ帯のアンテナから，携帯電話の電波がテレビ受信用増幅装置に入力され，これによって増幅回路が入力オーバーとなりテレビの受信障害が発生するのである。
それに対して，図５に示される従来例のように，テレビ受信用増幅装置７０を構成するＵＨＦ増幅回路２１の前に，図６に示すような特性を有する携帯電話の信号を除去するフィルタ５１を設けたり，図５に示すように，前記除去フィルタ５１と信号通過回路（ＵＨＦ帯を通過するフィルタ回路で除去フィルタは備えていない）５４を選択手段ＳＷで切換可能にしたりすることで，ＵＨＦ増幅回路２１に対して過大なレベルの妨害波が入力されるのを阻止できるように構成することによって，携帯電話によるテレビの受信障害の発生を防止するようにしたものが提案されている。（例えば，特許文献１参照）
Many mobile phone base stations have been installed on the rooftops and pillars of buildings and apartment buildings to expand the service area associated with the spread of mobile phones. This base station emits radio waves in the frequency band approved for mobile phones, and those using radio waves in the 800 MHz band (for example, 810 to 817 MH and 870 to 885 MHz) are televisions in the UHF band. Since it is a frequency band immediately above the signal (470 to 770 MHz) and is a very strong level compared to the television signal, it may become an interference wave of the television signal in the UHF band.
That is, the radio wave of the mobile phone is input to the TV reception amplifying device from the UHF band antenna installed in the TV receiving system or the like, thereby causing the amplifier circuit to be over-input and causing a TV reception failure.
On the other hand, as in the conventional example shown in FIG. 5, a filter 51 that removes a signal of a mobile phone having the characteristics shown in FIG. 5 or by making the selection filter SW switchable between the removal filter 51 and the signal passing circuit (filter circuit passing through the UHF band and not equipped with a removal filter) 54, as shown in FIG. A configuration has been proposed in which the occurrence of an interference in television reception by a mobile phone is prevented by preventing the input of an excessive level of interference waves to the amplifier circuit 21. (For example, see Patent Document 1)

特開２００４−２０１２５４号公報JP 2004-201254 A

ところで，ＵＨＦ帯の電波を使った放送として近年普及の著しい地上ディジタル放送があり，現在では地上アナログ放送が混在したサイマル放送が行われている。しかし，２０１１年には地上アナログ放送が完全停波されることになっており，ＶＨＦ帯とＵＨＦ帯の高域側の周波数帯を使ったアナログテレビ放送は行われない予定になっている。ところがアナログ放送が終了したＵＨＦ帯の高域側の周波数帯（７１０から７７０ＭＨｚ）は，テレビ放送以外のサービス用に（例えば，携帯電話用として）割り当てられる予定があり，このままでは，２０１１年以降，地上ディジタル放送の受信に新たな障害の発生が予想されるといった問題が有る。
それに加え，ＶＨＦ帯とＵＨＦ帯を増幅するテレビ受信用増幅装置を使ってサイマル放送を受信しているシステムでは，ＶＨＦ帯の放送が終了してもＶＨＦ帯の増幅回路が動作したままになるので，無駄な電力が消費された状態が続くといった問題がある。
更には，アナログ放送が停止されたときのアナログーディジタル変換工事において，ＵＨＦアンテナの設置や方向調整をしたときに，従来のＶＨＦ／ＵＨＦ受信システムから，必要のなくなったＶＨＦ帯のアンテナを取り除いてしまうような場合を考えると，従来のテレビ信号受信装置では，ＶＨＦ帯の増幅回路は稼動した状態のままにあるので，余分な電力を消費したり，入力側がオープン状態になってしまい，場合によってはテレビ受信用増幅装置が発振してしまったりといった問題が考えられる。
そこで本願においては，こうした問題点を解決するためになされたものであり，
その目的は，ＶＨＦ／ＵＨＦ帯および衛星放送などのテレビ放送の受信に適したテレビ受信用増幅装置を提供することを課題とする。
他の目的は，地上ディジタル放送の受信に好適なテレビ受信用増幅装置を提供することを課題とする。
他の目的は，妨害波による受信障害を排除可能なテレビ受信用増幅装置を提供することを課題とする。
他の目的は，アンテナの設置場所を変えたり，別筐体で構成された妨害波除去フィルタなどを使用したりすることなしに，携帯電話の信号による受信妨害を排除することを可能にするテレビ受信用増幅装置を提供することを課題とする。
他の目的は，妨害波による受信障害をテレビの視聴を停止することなく対応できるテレビ受信用増幅装置を提供することを課題とする。
他の目的は，簡単な操作で省電力化が可能なテレビ受信用増幅装置を提供することを課題とする。
By the way, there is terrestrial digital broadcasting that has been remarkably popular in recent years as broadcasting using radio waves in the UHF band, and simultaneous broadcasting in which terrestrial analog broadcasting is mixed is now being performed. However, in 2011, analog terrestrial broadcasting will be completely stopped, and analog television broadcasting using the high frequency bands of the VHF band and UHF band is not scheduled. However, the high frequency band (710 to 770 MHz) of the UHF band where analog broadcasting has ended is scheduled to be allocated for services other than television broadcasting (for example, for mobile phones). There is a problem that a new failure is expected to occur in the reception of digital terrestrial broadcasting.
In addition, in a system that receives simulcast using a TV receiving amplifying device that amplifies the VHF band and UHF band, the VHF band amplifier circuit remains in operation even after the VHF band broadcast ends. , There is a problem that a state where wasteful power is consumed continues.
Furthermore, in analog-to-digital conversion work when analog broadcasting was stopped, when the UHF antenna was installed and the direction was adjusted, the VHF band antenna that was no longer needed was removed from the conventional VHF / UHF reception system. In such a case, in the conventional television signal receiving apparatus, the VHF band amplifier circuit remains in an operating state, so that extra power is consumed or the input side is opened, and in some cases In such a case, there is a problem that the amplifying device for TV reception oscillates.
Therefore, in this application, it was made to solve these problems.
An object of the present invention is to provide a television reception amplifying apparatus suitable for receiving television broadcasts such as VHF / UHF bands and satellite broadcasts.
Another object of the present invention is to provide a television receiving amplifying apparatus suitable for receiving terrestrial digital broadcasting.
Another object of the present invention is to provide a television reception amplifying device that can eliminate reception interference due to interference waves.
Another purpose is a television that can eliminate reception interference caused by cellular phone signals without changing the installation location of the antenna or using an interference wave elimination filter configured in a separate housing. It is an object to provide a reception amplifying device.
Another object of the present invention is to provide a television reception amplifying apparatus that can cope with reception disturbance caused by an interference wave without stopping the viewing of the television.
Another object of the present invention is to provide an amplifying apparatus for television reception that can save power by a simple operation.

上記課題を解決するために，請求項１の発明は，少なくとも，第１及び第２の２つの異なる帯域の信号を増幅する増幅器からなる増幅回路を有するテレビ受信用増幅装置において，前記２つの異なる帯域の信号のうち，第１の帯域の信号を増幅する増幅回路の終段増幅器より入力側の伝送路の何れかの場所には，第１の帯域の信号と前記増幅回路を動作させるための電源電圧を通過する第１信号・電源通過回路と，第１の帯域の信号から所定の帯域の希望信号を通過するフィルタ回路と，前記第１信号・電源通過回路か，前記フィルタ回路かの何れかの経路を介して選択的に切替出力する第１選択手段と，を備え，前記第１選択手段の経路を前記第１信号・電源通過回路に選択したときは，第１信号・電源通過回路を通過した第１の帯域の信号は第１の帯域の信号を増幅する増幅器に入力され，第１信号・電源通過回路を通過した前記電源電圧は第２の帯域の信号を増幅する前記増幅回路に供給されるように構成され，前記第１選択手段の経路を前記フィルタ回路に選択したときは，当該フィルタ回路を通過した所定の帯域の希望信号は第１の帯域の信号を増幅する増幅器に入力され，前記電源電圧は前記フィルタ回路によって第２の帯域の信号を増幅する前記増幅回路に供給されるのを遮断されるように構成した。
In order to solve the above-mentioned problem, the invention of claim 1 is directed to a television receiving amplifying apparatus having an amplifying circuit comprising at least amplifiers for amplifying signals of the first and second different bands. Among the signals in the band, the signal in the first band and the amplifier circuit for operating the amplifier circuit are placed at any location on the input side of the final stage amplifier of the amplifier circuit that amplifies the signal in the first band. A first signal / power-pass circuit that passes power supply voltage, a filter circuit that passes a desired signal in a predetermined band from a signal in the first band, and either the first signal / power-pass circuit or the filter circuit First selection means for selectively switching and outputting via the path, and when the path of the first selection means is selected as the first signal / power passage circuit, the first signal / power passage circuit The first band signal that passed through Is input to an amplifier that amplifies the signal in the first band, and the power supply voltage that has passed through the first signal / power supply passing circuit is supplied to the amplifier circuit that amplifies the signal in the second band, When the filter circuit is selected as the path of the first selection means, a desired signal of a predetermined band that has passed through the filter circuit is input to an amplifier that amplifies the signal of the first band, and the power supply voltage is the filter The circuit is configured to be blocked from being supplied to the amplifier circuit that amplifies the signal in the second band.

請求項２の発明は，請求項１に記載のテレビ受信用増幅装置において，前記第１選択手段の入力側には，第１の帯域の信号を通過し選択手段側に出力すると共に第１電源電圧端から入力された電源電圧を通過し選択手段側に出力する第１電源重畳フィルタを備え，前記第１選択手段の出力側には，前記第１選択手段から出力される第１の帯域の信号を通過し出力側に出力すると共に伝送路に重畳された電源電圧を分離して第２電源電圧端から出力する第２電源分離フィルタを備え，前記第２電源分離フィルタの第２電源電圧端と第２の帯域の信号を増幅する増幅回路の電源接続端とを接続することによって，前記第１選択手段の経路を前記第１信号・電源通過回路に選択したときは，第１信号・電源通過回路を通過した第１の帯域の信号は第１の帯域の信号を増幅する増幅器に入力され，第１信号・電源通過回路を通過した前記電源電圧は，前記第２の電源分離フィルタの第２電源電圧端を介して第２の帯域の信号を増幅する前記増幅回路に供給されるように構成され，前記第１選択手段の経路を前記フィルタ回路に選択したときは，当該フィルタ回路を通過した妨害波が除去された希望信号は第１の帯域の信号を増幅する増幅器に入力され，前記電源電圧は前記フィルタ回路によって第２の帯域の信号を増幅する前記増幅回路に供給されるのを遮断されるように構成した。
According to a second aspect of the present invention, in the television receiving amplifying device according to the first aspect, a signal of the first band is passed to the input side of the first selection means and output to the selection means side, and a first power source is provided. A first power supply superimposing filter that passes the power supply voltage input from the voltage terminal and outputs the power supply voltage to the selection means side; the output side of the first selection means includes a first band output from the first selection means; A second power supply separation filter that passes the signal and outputs the output to the output side, and separates the power supply voltage superimposed on the transmission line and outputs it from the second power supply voltage end, and the second power supply voltage end of the second power supply separation filter When the path of the first selection means is selected as the first signal / power supply passage circuit by connecting the power supply connection end of the amplifier circuit for amplifying the second band signal, the first signal / power supply circuit is selected. The signal in the first band that has passed through the pass circuit is The power supply voltage that is input to the amplifier that amplifies the signal in the first band and passes through the first signal / power supply passing circuit is converted to the second band signal through the second power supply voltage terminal of the second power supply separation filter. When the filter circuit is selected as the path of the first selection means, the desired signal from which the interference wave that has passed through the filter circuit is removed is the first band. The power supply voltage is blocked from being supplied to the amplifier circuit for amplifying the second band signal by the filter circuit.

請求項３の発明は，請求項１または請求項２の何れか１項に記載のテレビ受信用増幅装置において，前記第１の帯域の信号はＵＨＦ帯のテレビ信号であり，第２の帯域の信号はＶＨＦ帯のテレビ信号であるように構成した。
According to a third aspect of the present invention, in the television reception amplifying device according to any one of the first or second aspects, the signal in the first band is a television signal in the UHF band, The signal was configured to be a VHF band television signal.

請求項４の発明は，少なくとも，アンテナからの第３の帯域の信号を入力する入力端子と，当該入力端子からの第３の帯域の信号を増幅する第３の帯域の信号を増幅する増幅器からなる増幅回路と，当該増幅回路によって増幅された信号を出力する出力端子を備えたテレビ受信用増幅装置において，第３の帯域の信号と前記増幅回路を動作させるための電源電圧を通過する第３信号・電源通過回路と，第３の帯域の信号と前記増幅回路を動作させるための電源電圧を遮断する遮断回路と，前記第３信号・電源通過回路か，前記遮断回路かの何れかの経路を介して選択的に切替出力する第３選択手段と，を備え，前記第３選択手段の経路を前記第３信号・電源通過回路に選択したときは，当該第３信号・電源通過回路を通過した第３の帯域の信号は第３の帯域の信号を増幅する増幅器に入力され，第３信号・電源通過回路を通過した前記電源電圧は第３の帯域の信号を増幅する前記増幅回路へ供給されると共に前記入力端子から出力されるように構成され，前記第３選択手段の経路を前記遮断回路に選択したときは，第３の帯域の信号を増幅する増幅器に入力される第３の帯域の信号は遮断され，前記電源電圧は第３の帯域の信号を増幅する前記増幅回路と前記入力端子へ供給されないように構成した。
The invention of claim 4 includes at least an input terminal for inputting a third band signal from the antenna, and an amplifier for amplifying a third band signal for amplifying the third band signal from the input terminal. In a television receiving amplifying device having an amplifier circuit and an output terminal for outputting a signal amplified by the amplifier circuit, a third band signal and a third power supply voltage for operating the amplifier circuit are passed. A signal / power-pass circuit, a third-band signal and a cut-off circuit that cuts off a power supply voltage for operating the amplifier circuit, and a path of either the third signal / power-pass circuit or the cut-off circuit And a third selection means for selectively switching output via the first signal / power supply passage circuit when the third selection means is selected to pass through the third signal / power supply passage circuit. Third band signal Is input to an amplifier that amplifies a signal in the third band, and the power supply voltage that has passed through the third signal / power supply passing circuit is supplied to the amplifier circuit that amplifies the signal in the third band, and from the input terminal. When the path of the third selection means is selected as the cutoff circuit, the third band signal input to the amplifier that amplifies the third band signal is cut off, The power supply voltage is configured not to be supplied to the amplifier circuit for amplifying the signal in the third band and the input terminal.

請求項５の発明は，請求項４に記載のテレビ受信用増幅装置において，前記第３選択手段の入力側には，前記入力端子から入力された第３の帯域の信号を通過し出力側に出力すると共に第３電源電圧端から入力された電源電圧を前記入力端子側に出力する第３電源重畳フィルタと，前記第３電源重畳フィルタから出力された第３の帯域の信号を通過し前記第３選択手段側に出力すると共に第４電源電圧端から入力された電源電圧を通過し前記第３選択手段側に出力する第４電源重畳フィルタと，を備え，前記第３選択手段の出力側には，前記第３選択手段の経路を前記第３信号・電源通過回路に選択したときに出力される第３の帯域の信号と電源電圧から第３の帯域の信号を第３の帯域の信号を増幅器側に出力すると共に，電源電圧を分離して第５電源電圧端から出力するする第５電源分離フィルタ，を備え，前記第５電源重畳フィルタの第５電源電圧端と前記第３電源分離フィルタの第３電源電圧端とを接続することによって，前記選択手段の経路を前記第３信号・電源通過回路に選択したときは，当該第３信号・電源通過回路を通過した第３の帯域の信号は第３の帯域の信号を増幅する前記増幅回路に入力され，第３信号・電源通過回路を通過した前記電源電圧は，前記第５電源分離フィルタの第５電源電圧端から第３の帯域の信号を増幅する前記増幅回路へ供給されると共に，第３電源重畳フィルタを介して入力端子から出力されるように構成され，前記第３選択手段の経路を前記遮断回路に選択したときは，第３の帯域の信号を増幅する増幅器に入力される第３の帯域の信号は遮断され，前記電源電圧は第３の帯域の信号を増幅する前記増幅回路と前記入力端子へ供給されないように構成した。
According to a fifth aspect of the present invention, in the television reception amplifying device according to the fourth aspect, the third band signal input from the input terminal is passed to the input side of the third selection means and the output side is passed. A third power supply superimposing filter for outputting to the input terminal side a power supply voltage input from the third power supply voltage terminal, and a third band signal output from the third power supply superimposing filter and passing through the third band signal. A fourth power supply superimposing filter that outputs to the third selection means side and passes the power supply voltage input from the fourth power supply voltage end and outputs to the third selection means side, and on the output side of the third selection means Takes the third band signal and the third band signal from the third band signal and the power supply voltage that are output when the path of the third selection means is selected by the third signal / power passage circuit. Outputs to the amplifier side and separates the power supply voltage A fifth power source separation filter that outputs from the fifth power source voltage end, and connecting the fifth power source voltage end of the fifth power source superposition filter and the third power source voltage end of the third power source separation filter, When the path of the selection means is selected as the third signal / power supply passage circuit, the third band signal that has passed through the third signal / power supply passage circuit amplifies the third band signal. The power supply voltage passed through the third signal / power supply passage circuit is supplied from the fifth power supply voltage end of the fifth power supply separation filter to the amplifier circuit for amplifying the third band signal, It is configured to be output from an input terminal via a third power supply superimposing filter, and when the path of the third selection means is selected as the cutoff circuit, it is input to an amplifier that amplifies the signal in the third band Third band signal Is cut off, the power supply voltage is configured not supplied to the input terminal and the amplifier circuit for amplifying a signal of the third band.

請求項６の発明は，請求項３または請求項４の何れか１項に記載のテレビ受信用増幅装置において，第３の帯域の信号を増幅する前記増幅回路は衛星放送受信用の衛星アンテナからの中間周波数帯の信号を増幅するように構成した。
According to a sixth aspect of the present invention, in the television receiving amplifying device according to any one of the third or fourth aspect, the amplifying circuit for amplifying the third band signal includes a satellite antenna for receiving a satellite broadcast. The intermediate frequency band signal is amplified.

請求項１から請求項３の発明によれば，ＶＨＦ帯とＵＨＦ帯のテレビ信号を使った地上アナログ放送と，ＵＨＦ帯のテレビ信号を使った地上ディジタル放送が混在したサイマル放送が行われていても，従来のテレビ受信用増幅装置と同様の使い方でテレビ受信システムが構築できる。
しかも，本発明のテレビ受信用増幅装置を用いてテレビ受信システムを構築していおけば，２０１１年に地上アナログ放送が終了した後であっても，スイッチからなる選択手段の簡単な操作一つで，ＵＨＦ帯のテレビ信号を増幅する増幅回路を動作させたまま，ＶＨＦ帯のテレビ信号を増幅する増幅回路の動作を停止できるのでテレビ受信用増幅装置が消費する電力量を少なくすることで省エネルギーとすることができるし，この省エネ化がスイッチの切替操作だけですむので，テレビの視聴を制限（停止）することなく工事が行える。そして，ＶＨＦ増幅回路を停止させておけば，入力がオープンになっても発振することが無く安定した使用ができる。
また，地上ディジタル放送のテレビ信号が割り当てられていないＵＨＦ帯の高域側の所定周波数帯域に，新たにＵＨＦ帯の高域側の所定周波数帯域を使ったサービスが割り当てられた場合でも，省エネ化によるＶＨＦ帯の増幅回路の停止スイッチ操作と同時に，テレビ受信用増幅装置に予め備えられた所定周波数帯の信号（つまり，妨害電波。）の通過を阻止するフィルタ回路によって当該電波がＵＨＦ帯のテレビ信号を増幅する増幅回路に入力されることを防止しするように構成されていることから，新たなサービスによって増幅回路が入力オーバー等を起こして受信障害が発生するといったことのない，極めて汎用性が高く利便性のよいテレビ受信用増幅装置が提供できるのである。
加えて，別筐体で構成された妨害波除去用のフィルタ回路をテレビ受信用増幅装置の前の同軸ケーブルに介挿させて対策する場合のように，妨害対策工事においてテレビの視聴を長時間に亘って制限すること無く工事が行えるので，この点においても優位性の高いテレビ受信用増幅装置を提供できる。
According to the inventions of claims 1 to 3, simultaneous broadcasting is performed in which terrestrial analog broadcasting using TV signals in the VHF band and UHF band and terrestrial digital broadcasting using TV signals in the UHF band are mixed. However, a television receiving system can be constructed in the same manner as a conventional television receiving amplifier.
Moreover, if a television reception system is constructed using the television reception amplifying device of the present invention, even after the terrestrial analog broadcasting is completed in 2011, it is possible to perform a simple operation of the selection means including switches. The operation of the amplifying circuit for amplifying the VHF band television signal can be stopped while the amplifying circuit for amplifying the UHF band television signal is operated, so that energy saving can be achieved by reducing the amount of power consumed by the amplifying device for receiving TV. This energy saving is only a switch operation, so construction can be done without restricting (stopping) watching TV. If the VHF amplifier circuit is stopped, it can be used stably without oscillation even when the input is open.
Even when a service using a predetermined frequency band on the high side of the UHF band is newly allocated to a predetermined frequency band on the high side of the UHF band to which no television signal for terrestrial digital broadcasting is allocated, energy saving is achieved. Simultaneously with the stop switch operation of the VHF band amplifier circuit by the TV, the radio wave is transmitted to the UHF band television by a filter circuit for blocking the passage of a signal of a predetermined frequency band (that is, jamming radio wave) provided in advance in the television receiving amplifier. Since it is configured to prevent the signal from being input to the amplifier circuit that amplifies the signal, the amplifier circuit will not cause an input over due to a new service and reception failure will not occur. Therefore, it is possible to provide a television receiving amplifying device that is high in convenience and high in convenience.
In addition, it is necessary to watch TV for a long time in interference countermeasure construction, such as when a filter circuit for eliminating interference wave, which is configured in a separate housing, is inserted in the coaxial cable in front of the television receiver amplifier. Thus, the construction can be performed without any limitation, so that it is possible to provide a television receiving amplifying device that is highly advantageous in this respect.

請求項４から請求項６の発明によれば，新しくテレビ受信システムを構築する際に，今は衛星放送を見ないが，将来見る場合に備えて，予め，ＶＨＦ／ＵＨＦ帯の増幅回路に加えて衛星アンテナからの中間周波数帯の信号を増幅する増幅回路を備えたブースターを設置しておく場合であっても，衛星放送を見ない間（即ち，衛星アンテナを接続していないとき）はＢＳ／ＣＳ増幅回路である中間周波数帯の増幅回路を動作しない状態に維持しておくことができるから省エネルギーになる。また，衛星放送を見るために衛星アンテナを設置したときは，スイッチからなる選択手段の簡単な操作一つで，中間周波数帯の増幅回路を動作させることができるし，同時に衛星アンテナを構成するコンバータへの給電を開始することができるので極めて利便性のよいテレビ受信用増幅装置を提供できる。
According to the fourth to sixth aspects of the present invention, when a new television receiving system is constructed, the satellite broadcast is not watched now, but in addition to the VHF / UHF band amplifier circuit in advance for the future view. Even when a booster having an amplifier circuit for amplifying the intermediate frequency band signal from the satellite antenna is installed, the BS is not used while watching the satellite broadcast (that is, when the satellite antenna is not connected). This saves energy because the amplifier circuit in the intermediate frequency band, which is the / CS amplifier circuit, can be kept in a non-operating state. In addition, when a satellite antenna is installed to watch satellite broadcasting, the amplifier circuit in the intermediate frequency band can be operated with one simple operation of the selection means consisting of switches, and at the same time a converter that constitutes the satellite antenna. Therefore, it is possible to provide an extremely convenient television receiving amplifying apparatus.

以下に，本発明を具体化した実施形態の例を，図面を基に詳細に説明する。
図１は本発明に係るテレビ受信用増幅装置を備えたテレビ受信用システム例を示し，図２は本発明のテレビ受信用増幅装置の例としてのＶＵ・ＢＳ／ＣＳブースターを示し，その概略構成を説明するためのブロック図である。図３は本発明の携帯電話信号除去フィルタの特性の一例を示す。図４は本発明に係る経路選択回路の異なる実施例を示すブロック図である。図５は従来のテレビ受信用増幅装置の概略構成を示すブロック図である。図６は従来の携帯電話信号除去フィルタの特性の一例を示す。
Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an example of a television receiving system provided with an amplifying device for receiving television according to the present invention, and FIG. 2 shows a VU / BS / CS booster as an example of the amplifying device for receiving television according to the present invention. It is a block diagram for demonstrating. FIG. 3 shows an example of the characteristics of the cellular phone signal elimination filter of the present invention. FIG. 4 is a block diagram showing another embodiment of the route selection circuit according to the present invention. FIG. 5 is a block diagram showing a schematic configuration of a conventional television receiving amplifying apparatus. FIG. 6 shows an example of the characteristics of a conventional cellular phone signal removal filter.

図１は，テレビ受信システム１００の構成例を示している。ＶＨＦ帯（例えば９０から２２２ＭＨｚ）を使ったテレビ放送局１０１，ＵＨＦ帯（例えば４７０から７７０ＭＨｚ）を使ったテレビ放送局１０３から放射された電波はそれぞれＶＨＦアンテナ２とＵＨＦアンテナ４で受信し，同軸ケーブル３ａ，３ｂを介してテレビ受信用増幅装置１の入力端子ＩＮ１，ＩＮ２から入力されている。また，ＢＳ（衛星放送）やＣＳ（通信衛星）からの電波は衛星アンテナ５で受信し，当該衛星アンテナ５に備えられた図には示されていないコンバータにおいて中間周波数帯（例えば１０３２から２６０２ＭＨｚ）の信号に周波数変換した後に，同軸ケーブル３ｃを介してテレビ受信用増幅装置１の入力端子ＩＮ３に入力されている。
テレビ信号増幅器１は例えば３０ｄＢの利得を有した増幅回路からなり，入力された各信号をそれぞれ所定レベルだけ増幅した後に混合し，一つの出力端子ＯＵＴから混合信号として出力される。出力された混合信号は同軸ケーブル３ｄを介して宅内に引き込まれてから分配器６に入力され，当該分配器６において所定の数だけ分配し出力される。本発明の実施例では，分配器６は４分配であり，分配された信号はそれぞれ同軸ケーブル３ｅを介してその端部に接続されたテレビ端子７ａ，７ｂ，７ｃ，７ｄに供給されている。このうちテレビ端子７ａには同軸ケーブ３ｆ，電源供給装置８を介して前記混合信号がテレビに入力されている。この電源供給装置８はテレビ９にテレビ受信用増幅装置１からの混合信号を通過すると共に，テレビ受信用増幅装置１に電源電圧を供給するためのものであり，電源電圧が同軸ケーブル３ｆ，テレビ端子７ａ，同軸ケーブル３ｅ，分配器６，同軸ケーブル３ｄを介してテレビ受信用増幅装置１のＯＵＴから供給されている。
FIG. 1 shows a configuration example of the television receiving system 100. Radio waves radiated from the television broadcast station 101 using the VHF band (for example, 90 to 222 MHz) and the television broadcast station 103 using the UHF band (for example, 470 to 770 MHz) are respectively received by the VHF antenna 2 and the UHF antenna 4 and are coaxial. The signals are input from the input terminals IN1 and IN2 of the television receiving amplifying device 1 through the cables 3a and 3b. In addition, radio waves from BS (satellite broadcasting) and CS (communication satellite) are received by the satellite antenna 5, and in an intermediate frequency band (for example, 1032 to 2602 MHz) in a converter not shown in the figure provided for the satellite antenna 5. After being frequency-converted to the above signal, the signal is input to the input terminal IN3 of the television receiving amplifying device 1 through the coaxial cable 3c.
The television signal amplifier 1 is composed of an amplifier circuit having a gain of, for example, 30 dB, amplifies each input signal by a predetermined level, mixes the signals, and outputs the mixed signals from one output terminal OUT. The output mixed signal is drawn into the house via the coaxial cable 3d and then input to the distributor 6, where a predetermined number of parts are distributed and output. In the embodiment of the present invention, the distributor 6 has four distributions, and the distributed signals are respectively supplied to the television terminals 7a, 7b, 7c, and 7d connected to the end portions thereof via the coaxial cable 3e. Among these, the mixed signal is input to the television terminal 7a via the coaxial cable 3f and the power supply device 8. This power supply device 8 is for passing the mixed signal from the television receiving amplifying device 1 to the television 9 and for supplying a power supply voltage to the television receiving amplifying device 1. The power supply voltage is the coaxial cable 3f, the television. It is supplied from OUT of the television receiver amplifier 1 via the terminal 7a, the coaxial cable 3e, the distributor 6, and the coaxial cable 3d.

図１に示される１０２はビルや集合住宅の屋上や，柱上などに数多く設置されている携帯電話用の基地局である。この基地局１０２からは，テレビ用のＵＨＦ帯の上側の周波数帯，例えば８１０から８１７ＭＨや８７０から８８５ＭＨｚを使った携帯電話の電波が送信されている。更に，２０１１年に地上アナログ放送が終了した後は，ＵＨＦ帯の高域側である７１０（ｃｈ５３）から７７０ＭＨｚ（ｃｈ６２）の周波数帯域はテレビ放送の割り当てがなくなり，その空いた周波数帯域には新しいサービス，例えば携帯電話の電波が割り当てられて送信されることが考えられる。
すでに送信されている電波を含め，特に，新しく割り当てられるとされる周波数帯域の電波は，ＵＨＦ帯を使った地上ディジタル放送（４７０から７１０ＭＨｚ）の周波数帯域のすぐ上側の周波数帯域であるため，これらの電波はＵＨＦアンテナ４で受信されてテレビ信号受信の妨害波となる。この電波はテレビ信号のレベルに比べて高く，この妨害波がテレビ受信用増幅装置１に入力されると増幅回路が入力レベルオーバーになりテレビの受信に障害が発生することがあり，その対策が必要となるのである。
Reference numeral 102 shown in FIG. 1 is a base station for a mobile phone that is installed in large numbers on the roofs of buildings and apartment buildings, on pillars, and the like. The base station 102 transmits a radio wave of a mobile phone using a frequency band above the UHF band for television, for example, 810 to 817 MHz or 870 to 885 MHz. Furthermore, after terrestrial analog broadcasting ended in 2011, the frequency band from 710 (ch53) to 770 MHz (ch62), which is the higher side of the UHF band, will no longer be allocated for television broadcasting, and the vacant frequency band will be new. It is conceivable that services such as mobile phone radio waves are allocated and transmitted.
In particular, radio waves in the frequency band newly assigned, including radio waves that have already been transmitted, are frequency bands immediately above the frequency band of terrestrial digital broadcasting (470 to 710 MHz) using the UHF band. Is received by the UHF antenna 4 and becomes an interference wave for receiving a television signal. This radio wave is higher than the level of the television signal, and when this interference wave is input to the television receiver amplification device 1, the amplifier circuit may exceed the input level, causing a failure in television reception. It is necessary.

図２を用いて本発明のテレビ受信用増幅装置１の実施例について具体的に説明する。ＶＨＦアンテナ２で受信されたＶＨＦ帯の信号は同軸ケーブル３ａを介してテレビ受信用増幅装置１のＶＨＦ入力端子ＩＮ１に入力される。入力されたＶＨＦ信号はＶＨＦ入力側フィルタ（例えば，コンデンサとコイルとからなるバンドパスフィルタ）１０を通過した後，ＶＨＦ増幅回路１１の入力端１２から入力され，高周波増幅素子としてのトランジスタやＩＣ等で構成された増幅器１３，１４等で所定量増幅された後に出力端１５から出力される。そして，増幅回路１１において増幅されたＶＨＦ信号はＶＨＦ出力側フィルタ（例えば，コンデンサとコイルとからなるローパスフィルタ）１６を通過した後に，後述するＵＨＦ帯の信号と混合される。更にこのＶＨＦ信号とＵＨＦ信号の混合信号は後述のＢＳ／ＣＳ信号とを混合するためのＶＵ出力側フィルタ２７（例えば，コンデンサとコイルとからなるローパスフィルタ）を通過して，ＶＨＦ帯の信号は，ＵＨＦ帯とＢＳ／ＣＳ帯の信号と混合されて電源分離フィルタ４０から出力端子ＯＵＴへ出力される。
この電源分離フィルタ４０は，ＶＵ・ＢＳ／ＣＳ帯の信号を出力端子ＯＵＴ側に通過すると共に，出力端子ＯＵＴに接続された同軸ケーブル３ｄに重畳されてきた前記電源供給装置８からの電源電圧を分離して電源電圧端４０ａから取り出すことができるように構成されている。
尚，本発明に係るＶＨＦ増幅回路１１は２段構成となっているが，その構成段数は２段構成でなくてもよい。また，自動若しくは手動で利得の調整を行うことができるよう利得調整回路を備えてもよい等，実施例に限定されるものではない。
An embodiment of the television receiving amplifying apparatus 1 of the present invention will be specifically described with reference to FIG. A VHF band signal received by the VHF antenna 2 is input to the VHF input terminal IN1 of the television receiving amplifying device 1 through the coaxial cable 3a. The input VHF signal passes through a VHF input side filter (for example, a band pass filter made up of a capacitor and a coil) 10 and is then input from the input terminal 12 of the VHF amplifier circuit 11 to be used as a high frequency amplifier element such as a transistor or an IC. After being amplified by a predetermined amount by the amplifiers 13 and 14 configured as described above, the signal is output from the output terminal 15. Then, the VHF signal amplified by the amplifier circuit 11 passes through a VHF output side filter (for example, a low-pass filter composed of a capacitor and a coil) 16 and is then mixed with a UHF band signal described later. Further, the mixed signal of the VHF signal and the UHF signal passes through a VU output side filter 27 (for example, a low-pass filter including a capacitor and a coil) for mixing a BS / CS signal described later, and the signal in the VHF band is , UHF band and BS / CS band signals are mixed and output from the power supply separation filter 40 to the output terminal OUT.
The power supply separation filter 40 passes the signal of the VU / BS / CS band to the output terminal OUT side, and supplies the power supply voltage from the power supply device 8 superimposed on the coaxial cable 3d connected to the output terminal OUT. The power supply voltage terminal 40a can be separated and taken out.
Although the VHF amplifier circuit 11 according to the present invention has a two-stage configuration, the number of stages may not be a two-stage configuration. In addition, the present invention is not limited to the embodiments, and a gain adjustment circuit may be provided so that the gain can be adjusted automatically or manually.

ＵＨＦアンテナ４で受信されたＵＨＦ帯の信号は同軸ケーブル３ｂを介してテレビ受信用増幅装置１のＵＨＦ入力端子ＩＮ２に入力される。入力されたＵＨＦ信号はＵＨＦ入力側フィルタ（例えば，コンデンサとコイルとからなるハイパスフィルタ）２０を通過した後に電源重畳フィルタ４１に入力される。電源重畳フィルタ４１はＵＨＦ入力側フィルタ２０を通過したＵＨＦ帯の信号を出力側に通過すると共に，電源電圧端４１ａに入力された電圧を出力側に通過するように構成されている。そして，本発明の実施例では，前記電源分離フィルタ４０の電源電圧端４０ａと前記電源重畳フィルタ４１の電源電圧端４１ａとを接続することによって，電源重畳フィルタ４１の出力からは，出力端子ＯＵＴに接続された同軸ケーブル３ｄに重畳されてきた電源電圧が出力されることになる。尚，電源重畳フィルタ４１が請求項に記載の第１電源重畳フィルタであり，電源電圧端子４１ａが請求項に記載の第１電源電圧端である。
The UHF band signal received by the UHF antenna 4 is input to the UHF input terminal IN2 of the television reception amplifying apparatus 1 through the coaxial cable 3b. The input UHF signal passes through a UHF input side filter (for example, a high-pass filter composed of a capacitor and a coil) 20 and then is input to the power superimposing filter 41. The power superimposing filter 41 is configured to pass the UHF band signal that has passed through the UHF input side filter 20 to the output side, and to pass the voltage input to the power supply voltage terminal 41a to the output side. In the embodiment of the present invention, by connecting the power supply voltage end 40a of the power supply separation filter 40 and the power supply voltage end 41a of the power supply superimposing filter 41, the output of the power superimposing filter 41 is connected to the output terminal OUT. The power supply voltage superimposed on the connected coaxial cable 3d is output. The power supply superimposing filter 41 is the first power supply superimposing filter described in the claims, and the power supply voltage terminal 41a is the first power supply voltage end described in the claims.

この電源重畳フィルタ４１を通過したＵＨＦ帯の信号と電源電圧は，例えばスイッチからなる第１選択手段ＳＷ１に入力される。この第１選択手段ＳＷ１には，電源重畳フィルタ４１を通過したＵＨＦ帯の信号の中から所定の帯域を通過させると共に，前記所定の帯域を除く信号（つまり，妨害波。）と前記電源電圧とを阻止する帯域制限用フィルタ（例えば，コンデンサとコイルで構成されたローパスフィルタとＤＣ電源遮断用のコンデンサＣからなる。）５０と，電源重畳フィルタ４１を通過したＵＨＦ帯の信号と電源電圧を通過する第１信号・電源通過回路５１が並列に接続されており，前記第１選択手段ＳＷ１の切換操作によって経路が選択的に切換えできる経路切換回路５５が形成されている。
The UHF band signal and the power supply voltage that have passed through the power supply superimposing filter 41 are input to the first selection means SW1 including a switch, for example. The first selection means SW1 passes a predetermined band from the UHF band signal that has passed through the power supply superimposing filter 41, and also removes the predetermined band (that is, an interference wave) and the power supply voltage. A band limiting filter (for example, comprising a low-pass filter composed of a capacitor and a coil and a capacitor C for cutting off the DC power supply) 50, and a UHF band signal passing through the power superimposing filter 41 and the power supply voltage are passed. The first signal / power passing circuit 51 is connected in parallel, and a path switching circuit 55 is formed which can selectively switch the path by the switching operation of the first selection means SW1.

この帯域制限用フィルタ５０は，妨害波となりうると予測されるＵＨＦ帯の高域側の周波数を使った携帯電話の信号と８００ＭＨｚ帯の携帯電話の信号を除去するためのものであり，本発明の実施例では図３に示すように少なくとも４７０から７１０ＭＨｚを通過帯域とし，それ以上の周波数帯，特に７１０から７７０ＭＨｚ帯の何れかの所定の周波数帯，８１０から８１７ＭＨおよび８７０から８８５ＭＨｚの周波数帯を使った携帯電話の電波の通過を阻止するように構成されている。
尚，この帯域制限用フィルタが請求項に記載の妨害波信号を除去するフィルタ回路で有る。また本発明の実施例では当該フィルタ回路５０はＵＨＦ入力側フィルタ２０とＵＨＦ増幅回路２１との間に備えた例を示したが，増幅回路２１の終段増幅器より入力側の伝送路のいずれに備えさせてもよい。また，本発明に実施例では選択手段ＳＷ１はスイッチである例を示したが，高周波素子としてのピンダイオード等から構成される半導体スイッチで構成してもよい。
The band limiting filter 50 is for removing a cellular phone signal and a 800 MHz cellular phone signal using a frequency on the high frequency side of the UHF band that is expected to be an interference wave. In this embodiment, as shown in FIG. 3, at least 470 to 710 MHz is used as a pass band, and a higher frequency band, in particular, a predetermined frequency band of 710 to 770 MHz, 810 to 817 MHz and 870 to 885 MHz. It is configured to block the passage of radio waves from the mobile phone used.
The band limiting filter is a filter circuit for removing the interference wave signal described in the claims. In the embodiment of the present invention, the filter circuit 50 is provided between the UHF input-side filter 20 and the UHF amplifier circuit 21. However, the filter circuit 50 is connected to any of the transmission lines on the input side from the final stage amplifier of the amplifier circuit 21. It may be provided. In the embodiment of the present invention, the selection unit SW1 is a switch. However, the selection unit SW1 may be a semiconductor switch including a pin diode as a high-frequency element.

また，前記第１信号・電源通過回路５１はＵＨＦ帯の信号と電源電圧を通過するように構成されていると共に，携帯電話に使われているＵＨＦ帯のすぐ上側の帯域である前記８１０から８１７ＭＨや８７０から８８５ＭＨｚの周波数帯を遮断するように構成（図６に示す従来のフィルタ回路と同様な特性を有する。）されている。
また，図４に示されるように，第２選択手段ＳＷ２に，前記帯域制限用フィルタ５０と，妨害波阻止フィルタを備えた前記第１信号・電源通過回路５１と，妨害波阻止フィルタを備えていない電源電圧と４７０から７７０ＭＨｚを通過帯域とする第２信号・電源通過回路（図５の従来例に示す５４と同様な構成であるが，ＵＨＦ帯の信号に加えて電源電圧が通過可能に構成されたフィルタ）５２を備えて，それらの経路を選択的に切換可能に構成した経路切換回路５５を構成してもよい。この第２信号・電源通過回路５２には妨害波阻止フィルタが備えられていないので，第２信号・電源通過回路５２のＵＨＦ帯の通過損失は，帯域制限用フィルタ５０，第１信号・電源通過回路５１に比べて通過損失を小さくすることができ，妨害波のない地域においてこのテレビ受信用増幅装置１を使用する場合などは，第２信号・電源通過回路５２を選択することによってより良好な受信ができるといった幅の広い地域において受信システムが構築できる。
The first signal / power passing circuit 51 is configured to pass a UHF band signal and a power supply voltage, and is a band immediately above the UHF band used for a cellular phone. Or 870 to 885 MHz (which has characteristics similar to those of the conventional filter circuit shown in FIG. 6).
Further, as shown in FIG. 4, the second selection means SW2 includes the band limiting filter 50, the first signal / power supply passage circuit 51 including an interference wave rejection filter, and an interference wave rejection filter. No power supply voltage and a second signal / power supply pass circuit having a pass band of 470 to 770 MHz (same configuration as 54 shown in the conventional example of FIG. 5 but configured to allow the supply voltage to pass in addition to the UHF band signal) And a path switching circuit 55 configured to selectively switch the paths. Since the second signal / power passing circuit 52 is not provided with an interference wave blocking filter, the UHF band passing loss of the second signal / power passing circuit 52 is the band limiting filter 50, the first signal / power passing. The passage loss can be reduced as compared with the circuit 51, and when the television receiving amplifying apparatus 1 is used in an area where there is no interfering wave, the second signal / power supply passage circuit 52 is selected to be better. A reception system can be constructed in a wide area where reception is possible.

第１選択手段ＳＷ１の出力側には電源分離フィルタ４２が接続されており，第１選択手段ＳＷ１によって選択された経路を通過するＵＨＦ帯の信号と電源電圧若しくはフィルタ回路５０によって帯域の制限されたＵＨＦ帯の信号は電源分離フィルタ４２に入力される。この電源分離フィルタ４２は第１選択手段ＳＷ１を通過したＵＨＦ帯の信号を出力側に通過すると共に，電源電圧が伝送路に重畳されているならこの電源電圧を電源電圧端４２ａから取り出すことができるように構成されたものである。そして，本発明の実施例では電源分離フィルタ４２の電源電圧端４２ａは前記ＶＨＦ増幅回路１１の電源接続端１１ａと接続されており，前記第１選択手段ＳＷ１を第１信号・電源通過回路５１側に選択したときは，ＵＨＦ帯の信号をＵＨＦ増幅回路２１に入力すると共に，前記出力端子ＯＵＴ側に接続された同軸ケーブルに重畳されてきた電源電圧は，電源分離フィルタ４０，電源重畳フィルタ４１，第１選択手段ＳＷ１，第１信号・電源通過回路５１，電源分離フィルタ４２の電源電圧端４２ａを介して電源接続端１１ａからＶＨＦ増幅回路１１の動作電源として供給されるように構成されている。
また逆に，前記第１選択手段ＳＷ１を帯域制限用フィルタ回路５０側に選択したときは，帯域の制限されたＵＨＦ帯の信号をＵＨＦ増幅回路２１に入力すると共に，ＶＨＦ増幅回路１１の動作電源は遮断されるように構成されている。尚，電源分離フィルタ４２が請求項に記載の第２電源分離フィルタであり，電源電圧端子４２ａが請求項に記載の第２電源電圧端である。
A power supply separation filter 42 is connected to the output side of the first selection means SW1, and the band is limited by the UHF band signal passing through the path selected by the first selection means SW1 and the power supply voltage or the filter circuit 50. The UHF band signal is input to the power supply separation filter 42. The power supply separation filter 42 passes the UHF band signal that has passed through the first selection means SW1 to the output side, and can extract the power supply voltage from the power supply voltage terminal 42a if the power supply voltage is superimposed on the transmission line. It is comprised as follows. In the embodiment of the present invention, the power supply voltage terminal 42a of the power supply separation filter 42 is connected to the power supply connection terminal 11a of the VHF amplifier circuit 11, and the first selection means SW1 is connected to the first signal / power supply circuit 51 side. Is selected, the UHF band signal is input to the UHF amplifier circuit 21, and the power supply voltage superimposed on the coaxial cable connected to the output terminal OUT side is divided into a power supply separation filter 40, a power supply superposition filter 41, The first selection means SW1, the first signal / power supply passage circuit 51, and the power supply voltage terminal 42a of the power supply separation filter 42 are supplied from the power supply connection terminal 11a as operating power for the VHF amplifier circuit 11.
On the contrary, when the first selection means SW1 is selected to the band limiting filter circuit 50 side, a UHF band signal whose band is limited is input to the UHF amplifier circuit 21 and the operation power supply of the VHF amplifier circuit 11 is used. Is configured to be blocked. The power supply separation filter 42 is the second power supply separation filter described in the claims, and the power supply voltage terminal 42a is the second power supply voltage terminal described in the claims.

電源分離フィルタ４２を通過したＵＨＦ帯の信号はＵＨＦ増幅回路２１の入力端２２から入力され増幅器２３，２４等で所定量増幅された後に出力端２５から出力される。ＵＨＦ増幅回路２１において増幅された信号はＵＨＦ出力側フィルタ２６（例えば，コンデンサとコイルとからなるハイパスフィルタ）を通過した後に，ＶＨＦ出力側フィルタ１６を通過したＶＨＦ帯の信号と混合される。そして，このＶＨＦ信号とＵＨＦ信号の混合信号は上述のようにＢＳ／ＣＳ信号とを混合するためのＶＵ出力側フィルタ２７を通過して，ＵＨＦ帯の信号は，ＶＨＦ帯とＢＳ／ＣＳ帯の信号と混合されて電源分離フィルタ４０から出力端子ＯＵＴへ出力される。
尚，本発明に係るＵＨＦ増幅回路２１は２段構成となっているが，その構成段数は２段構成でなくてもよい。また，自動若しくは手動で利得の調整を行うことができるよう利得調整回路を備えてもよい等，実施例に限定されるものではない。
The UHF band signal that has passed through the power supply separation filter 42 is input from the input terminal 22 of the UHF amplifier circuit 21, amplified by a predetermined amount by the amplifiers 23 and 24, and then output from the output terminal 25. The signal amplified in the UHF amplifier circuit 21 passes through a UHF output filter 26 (for example, a high-pass filter composed of a capacitor and a coil), and is then mixed with the VHF band signal that has passed through the VHF output filter 16. Then, the mixed signal of the VHF signal and the UHF signal passes through the VU output side filter 27 for mixing the BS / CS signal as described above, and the UHF band signal is transmitted between the VHF band and the BS / CS band. The signal is mixed and output from the power supply separation filter 40 to the output terminal OUT.
Note that the UHF amplifier circuit 21 according to the present invention has a two-stage configuration, but the number of stages may not be a two-stage configuration. In addition, the present invention is not limited to the embodiments, and a gain adjustment circuit may be provided so that the gain can be adjusted automatically or manually.

衛星アンテナ５で受信されたＢＳ／ＣＳの信号は同軸ケーブル３ｃを介してテレビ受信用増幅装置１のＢＳ／ＣＳ入力端子ＩＮ３に入力される。入力されたＢＳ／ＣＳ信号は電源重畳フィルタ４３，電源重畳フィルタ４４，第３選択手段ＳＷ３，電源分離フィルタ４５を介してＢＳ／ＣＳ増幅回路３１側に出力される。
この第３選択手段ＳＷ３には，ＢＳ／ＣＳ帯の信号と電源電圧を通過する第３信号・電源通過回路５２とＢＳ／ＣＳ帯の信号と電源電圧の通過を阻止する遮断回路とが並列に接続されており，前記第１選択手段ＳＷ１の切換操作によって，ＢＳ／ＣＳ帯の信号と電源電圧を通過するか，ＢＳ／ＣＳ帯の信号と電源電圧の通過を阻止する遮断するかの経路が選択的に切換出力できるようになっている。尚，本発明の実施例では，遮断回路は図に示されるようにオープン状態を示している。
The BS / CS signal received by the satellite antenna 5 is input to the BS / CS input terminal IN3 of the television receiving amplifying device 1 through the coaxial cable 3c. The input BS / CS signal is output to the BS / CS amplifying circuit 31 side through the power superimposing filter 43, the power superimposing filter 44, the third selection means SW3, and the power separation filter 45.
In the third selection means SW3, a third signal / power supply passage circuit 52 that passes the BS / CS band signal and the power supply voltage and a blocking circuit that blocks the passage of the BS / CS band signal and the power supply voltage are arranged in parallel. There is a path that is connected to pass the BS / CS band signal and the power supply voltage or to block the BS / CS band signal and the power supply voltage from being blocked by the switching operation of the first selection means SW1. It can be switched selectively. In the embodiment of the present invention, the interruption circuit is in an open state as shown in the figure.

ここでまず電源電圧の経路について説明する。本発明の実施例では，前記電源分離フィルタ４０の電源電圧端４０ａと電源重畳フィルタ４４の電源電圧端４４ａは接続されており，前記出力端子ＯＵＴ側に接続された同軸ケーブルに重畳されてきた電源電圧は電源重畳フィルタ４４によって伝送路に重畳され出力される。そして，第３選択手段ＳＷ３が信号・電源通過回路５３側に選択された場合は，電源電圧は電源分離フィルタ４５に入力される。この電源分離フィルタ４５の電源電圧端４５ａは前記電源重畳フィルタ４３の電源電圧端子４３ａと接続されていると共に，後述するＢＳ／ＣＳ増幅回路３１の電源接続端３１ａに接続されていることによって，電源分離フィルタ４５によって分離された電源電圧は電源重畳フィルタ４３を介してＢＳ／ＣＳ入力端子ＩＮ３から出力されると共に，ＢＳ／ＣＳ増幅回路３１の動作電源として供給されるように構成されている。
また，第３選択手段ＳＷ３が遮断回路側に選択された場合は，電源電圧の供給が遮断されるので，電源電圧がＢＳ／ＣＳ入力端子ＩＮ３から出力されなくなるし，同時にＢＳ／ＣＳ増幅回路３１への電源供給が止められる。尚，電源重畳フィルタ４３が請求項に記載の第３電源重畳フィルタであり，電源電圧端子４３ａが請求項に記載の第３電源電圧端である。また，電源重畳フィルタ４４が請求項に記載の第４電源重畳フィルタであり，電源電圧端子４４ａが請求項に記載の第４電源電圧端である。また，電源分離フィルタ４５が請求項に記載の第５電源分離フィルタであり，電源電圧端子４５ａが請求項に記載の第５電源電圧端である。また，本発明に実施例では選択手段ＳＷ３はスイッチである例を示したが，高周波素子としてのピンダイオード等から構成される半導体スイッチで構成してもよい。
First, the path of the power supply voltage will be described. In an embodiment of the present invention, the power supply voltage end 40a of the power supply separation filter 40 and the power supply voltage end 44a of the power supply superimposing filter 44 are connected, and the power supply superimposed on the coaxial cable connected to the output terminal OUT side. The voltage is superimposed on the transmission line by the power superimposing filter 44 and output. When the third selection means SW3 is selected on the signal / power supply passage circuit 53 side, the power supply voltage is input to the power supply separation filter 45. A power supply voltage terminal 45a of the power supply separation filter 45 is connected to a power supply voltage terminal 43a of the power supply superimposing filter 43, and also connected to a power supply connection terminal 31a of a BS / CS amplifier circuit 31 to be described later. The power supply voltage separated by the separation filter 45 is output from the BS / CS input terminal IN3 via the power supply superimposing filter 43 and is also supplied as an operating power supply for the BS / CS amplifier circuit 31.
When the third selection means SW3 is selected on the cutoff circuit side, the supply of the power supply voltage is cut off, so that the power supply voltage is not output from the BS / CS input terminal IN3 and at the same time, the BS / CS amplifier circuit 31. The power supply to is stopped. The power supply superimposing filter 43 is the third power supply superimposing filter described in the claims, and the power supply voltage terminal 43a is the third power supply voltage terminal described in the claims. The power supply superimposing filter 44 is the fourth power supply superimposing filter described in the claims, and the power supply voltage terminal 44a is the fourth power supply voltage end described in the claims. The power supply separation filter 45 is the fifth power supply separation filter according to the claims, and the power supply voltage terminal 45a is the fifth power supply voltage terminal according to the claims. In the embodiment of the present invention, the selection unit SW3 is a switch. However, the selection unit SW3 may be a semiconductor switch including a pin diode as a high-frequency element.

次に，ＢＳ／ＣＳ信号の流れについて説明する。電源分離フィルタ４５を通過したＢＳ／ＣＳ信号は，ＢＳ／ＣＳ入力側フィルタ（例えば，コンデンサとコイルとからなるハイパスフィルタ）３０を通過した後，ＢＳ／ＣＳ増幅回路３１の入力端３２から入力され，高周波増幅素子としてのトランジスタやＩＣ等で構成された増幅器３３，３４等で所定量増幅された後に出力端３５から出力される。そして，ＢＳ／ＣＳ増幅回路３１において増幅されたＢＳ／ＣＳ信号はＢＳ／ＣＳ出力側フィルタ（例えばハイパスフィルタ）３６を通過した後に，ＶＨＦ帯およびＵＨＦ帯の信号と混合される。そして，ＶＨＦ帯とＵＨＦ帯とＢＳ／ＣＳ帯の混合信号は電源分離フィルタ４０から出力端子ＯＵＴへ出力される。
尚，本発明に係るＢＳ／ＣＳ増幅回路３１は２段構成となっているが，その構成段数は２段構成でなくてもよい。また，自動若しくは手動で利得の調整を行うことができるよう利得調整回路を備えてもよい等，実施例に限定されるものではない。
Next, the flow of BS / CS signals will be described. The BS / CS signal that has passed through the power supply separation filter 45 passes through a BS / CS input side filter (for example, a high-pass filter composed of a capacitor and a coil) 30 and is then input from the input terminal 32 of the BS / CS amplifier circuit 31. After being amplified by a predetermined amount by amplifiers 33, 34, etc. composed of transistors, ICs, etc. as high frequency amplifying elements, they are outputted from the output terminal 35. The BS / CS signal amplified in the BS / CS amplifier circuit 31 passes through a BS / CS output filter (for example, a high-pass filter) 36 and is then mixed with signals in the VHF band and the UHF band. The mixed signal of the VHF band, UHF band, and BS / CS band is output from the power supply separation filter 40 to the output terminal OUT.
Although the BS / CS amplifier circuit 31 according to the present invention has a two-stage configuration, the number of stages may not be a two-stage configuration. In addition, the present invention is not limited to the embodiments, and a gain adjustment circuit may be provided so that the gain can be adjusted automatically or manually.

このように構成されたテレビ受信用増幅装置の効果を説明する。まず，ＶＨＦ帯とＵＨＦ帯のテレビ信号を使った地上アナログ放送と，ＵＨＦ帯のテレビ信号を使った地上ディジタル放送が混在したサイマル放送が行われていても，従来のテレビ受信用増幅装置と同様の使い方でテレビ受信システムが構築できる。
The effect of the television reception amplifying apparatus configured as described above will be described. First, even if simultaneous broadcasting is performed in which terrestrial analog broadcasting using television signals in the VHF band and UHF band and terrestrial digital broadcasting using television signals in the UHF band are performed, it is the same as the conventional television receiving amplifier. A TV reception system can be constructed by using

しかも，本発明のテレビ受信用増幅装置を用いてテレビ受信システムを構築していおけば，２０１１年に地上アナログ放送が終了した後であっても，スイッチからなる選択手段ＳＷ１の簡単な操作一つで，ＵＨＦ帯のテレビ信号を増幅する増幅回路２１を動作させたまま，ＶＨＦ帯のテレビ信号を増幅する増幅回路１１の動作を停止できるのでテレビ受信用増幅装置１が消費する電力量を少なくすることで省エネルギーとすることができるし，この省エネ化がスイッチの切替操作だけですむので，テレビの視聴を制限（停止）することなく工事が行える。そして，ＶＨＦアンテナを取り外してＶＨＦの入力がオープンになっても増幅回路１１が発振することがなくなるので，この点からも安定して使用ができるのである
In addition, if a television reception system is constructed using the television reception amplifying device of the present invention, even after terrestrial analog broadcasting is completed in 2011, one simple operation of the selection means SW1 comprising a switch is possible. Thus, the operation of the amplifying circuit 11 for amplifying the VHF band TV signal can be stopped while the amplifying circuit 21 for amplifying the UHF band TV signal is operated, so that the amount of power consumed by the amplifying apparatus 1 for TV reception is reduced. This can save energy, and since this energy saving can be done only by switching the switch, it is possible to perform construction without restricting (stopping) watching TV. And even if the VHF antenna is removed and the VHF input becomes open, the amplifier circuit 11 will not oscillate, so that it can also be used stably from this point.

また，地上ディジタル放送のテレビ信号が割り当てられていないＵＨＦ帯の高域側の所定周波数帯域に，新たにＵＨＦ帯の高域側の所定周波数帯域を使ったサービスが割り当てられた場合でも，スイッチ操作によるＶＨＦ帯の増幅回路の停止による省エネ化と同時に，テレビ受信用増幅装置に予め備えられた所定周波数帯の信号（つまり，妨害電波。）の通過を阻止するフィルタ回路によって当該電波がＵＨＦ帯のテレビ信号を増幅する増幅回路に入力されることを防止するように線路切換回路５５が構成されていることから，新たなサービスによって増幅回路が入力オーバー等を起こして受信障害が発生するといったことのない，極めて汎用性が高く利便性のよいテレビ受信用増幅装置が提供できるのである。
また，上記実施例の図４によく示される経路切換回路５５の異なる実施例のように，第２選択手段ＳＷ２に，前記帯域制限用フィルタ５０と，従来からある携帯電話の周波数帯（８００ＭＨｚ帯）の妨害波阻止フィルタを備えた４７０から７７０ＭＨｚを通過帯域する前記第１信号・電源通過回路５１と，電源電圧と妨害波阻止フィルタを備えていない４７０から７７０ＭＨｚの帯域を通過帯域とする第２信号・電源通過回路５２を並列に接続して，それらの経路を選択的に切換可能に構成すれば，携帯電波の基地局から離れていたり，建物などで遮蔽されていたりして携帯電話の電波による妨害がない地域では，妨害阻止フィルタを備えたほかの経路に比べて通貨損失の小さな第２信号・電源通過回路を選択することによってより良好な受信ができるようにすることができる。
加えて，別筐体で構成された妨害波除去用のフィルタ回路をテレビ受信用増幅装置の前の同軸ケーブルに介挿させて対策する場合のように，妨害対策工事においてテレビの視聴を長時間に亘って制限すること無く工事が行えるので，この点においても優位性の高いテレビ受信用増幅装置を提供できる。
Even if a service using a predetermined frequency band on the high side of the UHF band is newly assigned to a predetermined frequency band on the high side of the UHF band to which a television signal for terrestrial digital broadcasting is not allocated, the switch operation is performed. At the same time as saving energy by stopping the amplifier circuit in the VHF band due to the above, the radio wave is transmitted to the UHF band by a filter circuit for blocking the passage of a signal of a predetermined frequency band (that is, an interfering radio wave) provided in advance in the television receiving amplifier. Since the line switching circuit 55 is configured to prevent the television signal from being input to the amplifier circuit that amplifies the TV signal, the amplifier circuit causes an input over or the like due to a new service, resulting in reception failure. It is possible to provide a television receiving amplifying apparatus that is extremely versatile and convenient.
Further, as in a different embodiment of the path switching circuit 55 well shown in FIG. 4 of the above embodiment, the band selecting filter 50 and the frequency band (800 MHz band) of a conventional mobile phone are provided in the second selection means SW2. The first signal / power-pass circuit 51 having a passband of 470 to 770 MHz with the interference wave rejection filter of FIG. 2 and a second band having a passband of 470 to 770 MHz without the power supply voltage and the interference wave rejection filter. If the signal / power passage circuit 52 is connected in parallel so that the paths can be selectively switched, the mobile phone radio wave may be separated from the mobile radio base station or shielded by a building or the like. In areas where there is no interference due to interference, it is better to select a second signal / power-pass circuit that has a smaller currency loss than other routes with interference prevention filters. It is possible to be able to.
In addition, it is necessary to watch TV for a long time in interference countermeasure construction, such as when a filter circuit for eliminating interference wave, which is configured in a separate housing, is inserted in the coaxial cable in front of the television receiver amplifier. Thus, the construction can be performed without any limitation, so that it is possible to provide a television receiving amplifying device that is highly advantageous in this respect.

また，テレビ受信システムを構築する際に，今は衛星放送を見ないが，将来見る場合があることに備えて，予め，ＶＨＦとＵＨＦ帯の増幅回路１１と２１に加えて衛星アンテナからの中間周波数帯の信号を増幅する増幅回路３１を備えたブースターを設置する場合であっても，衛星放送を見ない間（即ち，衛星アンテナを接続していないとき）は第３選択手段ＳＷ３の簡単な操作一つで，中間周波数帯の増幅回路３１を動作しない状態に維持できるから省エネルギーになる。また，衛星放送を見るために衛星アンテナを追加したときは，スイッチからなる第３選択手段ＳＷ３を第３信号・電源通過回路側に切換える簡単な操作一つで，中間周波数帯の増幅回路３１を動作させることができるし，切換と同時に衛星アンテナを構成するコンバータへの給電を入力端子ＩＮ３から開始することができる利便性のよいテレビ受信用増幅装置を提供できる。

尚，本発明は上記実施の形態に限定されるものではなく，以下に例示するように，本発明の趣旨を逸脱しない範囲で各部の構成を適宜に変更して実施することも可能である。
本発明の実施例では，ＶＨＦ帯とＵＨＦ帯の信号が別入力のテレビ受信用増幅装置の例を示したがＶＨＦ帯とＵＨＦ帯の混合入力型にしてもよいし，別入力，混合入力を切換可能にしてもよい。
また，上記実施例に示すＢＳ／ＣＳ増幅回路は有ってもよいし無くてもよいし，ＢＳ／ＣＳ増幅回路だけを備えたＢＳ／ＣＳブースターであってもよい。
また本発明の実施例ではテレビ受信用増幅装置１と電源供給装置８が別体である電源分離型の例を示したが，電源供給装置をテレビ受信用増幅装置に内蔵させたものに対応するように構成してもよい。
更に，本発明の実施例ではＵＨＦ帯域（７１０から７７０ＭＨｚ）内に発生する妨害波の対策の例を示したが，図５に示すＵＨＦ帯域のすぐ上側の帯域（８００ＭＨｚ帯）に発生する妨害波の対策の例として示した従来例に対して，選択手段ＳＷの切換操作と連携してＶＨＦ増幅回路への電源供給を行ったり停止したりするように構成してもよいことは言うまでも無い。
In addition, when constructing a television receiving system, satellite broadcasting is not watched now, but in the future, in the future, in addition to VHF and UHF band amplifier circuits 11 and 21, an intermediate from a satellite antenna may be used. Even when a booster having an amplification circuit 31 for amplifying a signal in the frequency band is installed, the third selection means SW3 can be simply used while the satellite broadcast is not being watched (that is, when the satellite antenna is not connected). One operation can save energy because the amplifier circuit 31 in the intermediate frequency band can be maintained in a non-operating state. Further, when a satellite antenna is added to watch satellite broadcasting, the intermediate frequency band amplifier circuit 31 can be switched by one simple operation of switching the third selection means SW3 comprising a switch to the third signal / power supply circuit side. It is possible to provide a convenient television reception amplifying apparatus that can be operated and that can simultaneously start power supply to the converter constituting the satellite antenna from the input terminal IN3.

The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the configuration of each part without departing from the spirit of the present invention, as exemplified below.
In the embodiment of the present invention, an example of a television receiving amplifying apparatus in which signals in the VHF band and the UHF band are separately input is shown. However, a mixed input type of the VHF band and the UHF band may be used. It may be switchable.
Further, the BS / CS amplifier circuit shown in the above embodiment may or may not be provided, or may be a BS / CS booster provided with only the BS / CS amplifier circuit.
In the embodiment of the present invention, an example of a power supply separation type in which the television receiving amplifying device 1 and the power supply device 8 are separated is shown. However, this embodiment corresponds to a case where the power supply device is built in the television receiving amplifying device. You may comprise as follows.
Further, in the embodiment of the present invention, an example of countermeasures against interference waves generated in the UHF band (710 to 770 MHz) is shown. However, interference waves generated in the band (800 MHz band) immediately above the UHF band shown in FIG. It goes without saying that the power supply to the VHF amplifier circuit may be performed or stopped in cooperation with the switching operation of the selection means SW, in contrast to the conventional example shown as an example of the countermeasure. .

本発明に係るテレビ受信用増幅装置を備えたテレビ受信用システム例を示す。1 shows an example of a television reception system including a television reception amplification device according to the present invention. 本発明のテレビ受信用増幅装置の例としてのＶＵ・ＢＳ／ＣＳブースターを示し，その概略構成を説明するためのブロック図である。FIG. 2 is a block diagram illustrating a schematic configuration of a VU / BS / CS booster as an example of a television reception amplifying device of the present invention. 本発明にかかる携帯電話信号除去フィルタの特性の一例を示す。An example of the characteristic of the mobile telephone signal removal filter concerning this invention is shown. 経路切換回路の異なる実施例を示すブロック図である。It is a block diagram which shows the Example from which a path switching circuit differs. 従来のテレビ受信用増幅装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the conventional television receiving amplifier. 従来の携帯電話信号除去フィルタの特性の一例を示す。An example of the characteristic of the conventional mobile telephone signal removal filter is shown.

符号の説明Explanation of symbols

１…テレビ受信用増幅装置，２…ＶＨＦアンテナ，３…同軸ケーブル，４…ＵＨＦアンテナ，５…衛星アンテナ，６…分配器，７…テレビ端子，８…電源部，９…テレビ，１０…ＶＨＦ入力側フィルタ，１１…ＶＨＦ増幅回路，１２…入力端，１３・１４…増幅器，１５…出力端，１６…ＶＨＦ出力側フィルタ，２０…ＵＨＦ入力側フィルタ，２１…ＵＨＦ増幅回路，２２…入力端，２３・２４…増幅器，２５…出力端，２６…ＵＨＦ出力側フィルタ，２７…ＶＵ出力側フィルタ，３０…ＢＳ／ＣＳ入力側フィルタ，３１…ＢＳ／ＣＳ増幅回路，３２…入力端，３３・３４…増幅器，３５…出力端，３６…ＢＳ／ＣＳ出力側フィルタ，４０…電源分離フィルタ，４１…（第１）電源重畳フィルタ，４２…（第２）電源分離フィルタ，４３…（第３）電源重畳フィルタ，４４…（第４）電源重畳フィルタ，４５…（第５）電源分離フィルタ，５０…妨害波除去用のフィルタ回路，５１…第１信号・電源通過回路，５２…第２信号・電源通過回路，５３…第３信号・電源通過回路，５４…信号通過回路，７０…従来のテレビ受信用増幅装置，１００…テレビ受信システム，１０１…ＶＨＦ帯のテレビ放送局，１０２…携帯電話の基地局，１０３…ＵＨＦ帯のテレビ放送局，ＳＷ…選択手段，ＳＷ１…第１選択手段，ＳＷ２…第２選択手段，ＳＷ３…第３選択手段。 DESCRIPTION OF SYMBOLS 1 ... Television receiver amplifier, 2 ... VHF antenna, 3 ... Coaxial cable, 4 ... UHF antenna, 5 ... Satellite antenna, 6 ... Distributor, 7 ... Television terminal, 8 ... Power supply part, 9 ... Television, 10 ... VHF Input side filter, 11 ... VHF amplifier circuit, 12 ... input end, 13.14 ... amplifier, 15 ... output end, 16 ... VHF output side filter, 20 ... UHF input side filter, 21 ... UHF amplifier circuit, 22 ... input end , 23. 24... Amplifier, 25... Output end, 26... UHF output side filter, 27... VU output side filter, 30 ... BS / CS input side filter, 31 ... BS / CS amplifier circuit, 32. 34 ... Amplifier, 35 ... Output end, 36 ... BS / CS output side filter, 40 ... Power supply separation filter, 41 ... (First) power supply superposition filter, 42 ... (Second) Power supply separation filter, 43 ... ( 3) Power superimposing filter, 44... (4) Power superimposing filter, 45... (5) Power separating filter, 50... Filter circuit for removing interference wave, 51. Signal / power passing circuit 53 ... third signal / power passing circuit 54 ... signal passing circuit 70 ... conventional television receiving amplifying device 100 ... TV receiving system 101 ... VHF band TV broadcasting station 102 ... mobile Telephone base station, 103... UHF band television broadcasting station, SW... Selection means, SW1... First selection means, SW2... Second selection means, SW3.

Claims (6)

少なくとも，第１及び第２の２つの異なる帯域の信号を増幅する増幅器からなる増幅回路を有するテレビ受信用増幅装置において，
前記２つの異なる帯域の信号のうち，第１の帯域の信号を増幅する増幅回路の終段増幅器より入力側の伝送路の何れかの場所には，
第１の帯域の信号と前記増幅回路を動作させるための電源電圧を通過する第１信号・電源通過回路と，
第１の帯域の信号から所定の帯域の希望信号を通過するフィルタ回路と，
前記第１信号・電源通過回路か，前記フィルタ回路かの何れかの経路を介して選択的に切替出力する第１選択手段と，を備え，
前記第１選択手段の経路を前記第１信号・電源通過回路に選択したときは，第１信号・電源通過回路を通過した第１の帯域の信号は第１の帯域の信号を増幅する増幅器に入力され，第１信号・電源通過回路を通過した前記電源電圧は第２の帯域の信号を増幅する前記増幅回路に供給されるように構成され，
前記第１選択手段の経路を前記フィルタ回路に選択したときは，当該フィルタ回路を通過した所定の帯域の希望信号は第１の帯域の信号を増幅する増幅器に入力され，前記電源電圧は前記フィルタ回路によって第２の帯域の信号を増幅する前記増幅回路に供給されるのを遮断されるように構成したことを特徴とするテレビ受信用増幅装置。
In a television receiving amplifying apparatus having an amplifying circuit composed of an amplifier that amplifies signals of at least two first and second different bands,
Of the two different band signals, any one of the transmission lines on the input side of the final stage amplifier of the amplifier circuit that amplifies the first band signal,
A first signal / power-pass circuit that passes a first-band signal and a power-supply voltage for operating the amplifier circuit;
A filter circuit that passes a desired signal in a predetermined band from a signal in the first band;
First selection means for selectively switching and outputting via either the first signal / power supply passage circuit or the filter circuit;
When the path of the first selection means is selected as the first signal / power supply passage circuit, the signal of the first band that has passed through the first signal / power supply passage circuit becomes an amplifier that amplifies the signal of the first band. The power supply voltage input and passed through the first signal / power supply passage circuit is configured to be supplied to the amplifier circuit that amplifies the signal in the second band,
When the filter circuit is selected as the path of the first selection means, a desired signal of a predetermined band that has passed through the filter circuit is input to an amplifier that amplifies the signal of the first band, and the power supply voltage is the filter A television receiving amplifying device characterized in that it is blocked from being supplied to the amplifying circuit for amplifying a signal in the second band by a circuit.
前記第１選択手段の入力側には，第１の帯域の信号を通過し選択手段側に出力すると共に第１電源電圧端から入力された電源電圧を通過し選択手段側に出力する第１電源重畳フィルタを備え，
前記第１選択手段の出力側には，前記第１選択手段から出力される第１の帯域の信号を通過し出力側に出力すると共に伝送路に重畳された電源電圧を分離して第２電源電圧端から出力する第２電源分離フィルタを備え，
前記第２電源分離フィルタの第２電源電圧端と第２の帯域の信号を増幅する増幅回路の電源接続端とを接続することによって，
前記第１選択手段の経路を前記第１信号・電源通過回路に選択したときは，第１信号・電源通過回路を通過した第１の帯域の信号は第１の帯域の信号を増幅する増幅器に入力され，第１信号・電源通過回路を通過した前記電源電圧は，前記第２の電源分離フィルタの第２電源電圧端を介して第２の帯域の信号を増幅する前記増幅回路に供給されるように構成され，
前記第１選択手段の経路を前記フィルタ回路に選択したときは，当該フィルタ回路を通過した妨害波が除去された希望信号は第１の帯域の信号を増幅する増幅器に入力され，前記電源電圧は前記フィルタ回路によって第２の帯域の信号を増幅する前記増幅回路に供給されるのを遮断されるように構成したことを特徴とする請求項１に記載のテレビ受信用増幅装置。
On the input side of the first selection means, a first power source that passes a signal in the first band and outputs it to the selection means side, and also passes a power supply voltage input from the first power supply voltage terminal and outputs it to the selection means side. With superposition filter,
On the output side of the first selection means, a signal in the first band outputted from the first selection means is passed and outputted to the output side, and the power supply voltage superimposed on the transmission line is separated and a second power supply is separated. A second power supply separation filter that outputs from the voltage end;
By connecting the second power supply voltage terminal of the second power supply separation filter and the power supply connection terminal of the amplifier circuit that amplifies the signal of the second band,
When the path of the first selection means is selected as the first signal / power supply passage circuit, the signal of the first band that has passed through the first signal / power supply passage circuit becomes an amplifier that amplifies the signal of the first band. The power supply voltage input and passed through the first signal / power supply passage circuit is supplied to the amplifier circuit that amplifies the signal in the second band through the second power supply voltage terminal of the second power supply separation filter. Configured as
When the filter circuit is selected as the path of the first selection means, the desired signal from which the interference wave that has passed through the filter circuit is removed is input to an amplifier that amplifies the signal in the first band, and the power supply voltage is 2. The television receiving amplifying device according to claim 1, wherein the filter circuit is configured to be blocked from being supplied to the amplifying circuit that amplifies the signal in the second band.
前記第１の帯域の信号はＵＨＦ帯のテレビ信号であり，第２の帯域の信号はＶＨＦ帯のテレビ信号であり，妨害波は携帯電話の電波であることを特徴とした請求項１または請求項２の何れか１項に記載のテレビ受信用増幅装置。
2. The signal according to claim 1, wherein the first band signal is a UHF band television signal, the second band signal is a VHF band television signal, and the interference wave is a mobile phone radio wave. Item 3. The television receiving amplifying device according to any one of Items 2 to 3.
少なくとも，アンテナからの第３の帯域の信号を入力する入力端子と，当該入力端子からの第３の帯域の信号を増幅する第３の帯域の信号を増幅する増幅器からなる増幅回路と，当該増幅回路によって増幅された信号を出力する出力端子を備えたテレビ受信用増幅装置において，
第３の帯域の信号と前記増幅回路を動作させるための電源電圧を通過する第３信号・電源通過回路と，
第３の帯域の信号と前記増幅回路を動作させるための電源電圧を遮断する遮断回路と，
前記第３信号・電源通過回路か，前記遮断回路かの何れかの経路を介して選択的に切替出力する第３選択手段と，を備え，
前記第３選択手段の経路を前記第３信号・電源通過回路に選択したときは，当該第３信号・電源通過回路を通過した第３の帯域の信号は第３の帯域の信号を増幅する増幅器に入力され，第３信号・電源通過回路を通過した前記電源電圧は第３の帯域の信号を増幅する前記増幅回路へ供給されると共に前記入力端子から出力されるように構成され，
前記第３選択手段の経路を前記遮断回路に選択したときは，第３の帯域の信号を増幅する増幅器に入力される第３の帯域の信号は遮断され，前記電源電圧は第３の帯域の信号を増幅する前記増幅回路と前記入力端子へ供給されないように構成した事を特徴とするテレビ受信用増幅装置。
An amplifying circuit comprising at least an input terminal for inputting a third band signal from the antenna; an amplifier for amplifying a third band signal for amplifying the third band signal from the input terminal; In a television receiving amplifying apparatus having an output terminal for outputting a signal amplified by a circuit,
A third signal / power pass circuit that passes a third band signal and a power supply voltage for operating the amplifier circuit;
A cutoff circuit for cutting off a signal in a third band and a power supply voltage for operating the amplifier circuit;
And a third selection means for selectively switching and outputting via either the third signal / power supply passage circuit or the cutoff circuit,
When the path of the third selection means is selected as the third signal / power passage circuit, the third band signal that has passed through the third signal / power passage circuit amplifies the third band signal. The power supply voltage passed through the third signal / power passage circuit is supplied to the amplifier circuit for amplifying a third band signal and output from the input terminal,
When the path of the third selection means is selected as the cutoff circuit, the third band signal input to the amplifier for amplifying the third band signal is cut off, and the power supply voltage is A television receiving amplifying device, wherein the amplifying circuit for amplifying a signal is configured not to be supplied to the input terminal.
前記第３選択手段の入力側には，前記入力端子から入力された第３の帯域の信号を通過し出力側に出力すると共に第３電源電圧端から入力された電源電圧を前記入力端子側に出力する第３電源重畳フィルタと，
前記第３電源重畳フィルタから出力された第３の帯域の信号を通過し前記第３選択手段側に出力すると共に第４電源電圧端から入力された電源電圧を通過し前記第３選択手段側に出力する第４電源重畳フィルタと，を備え，
前記第３選択手段の出力側には，
前記第３選択手段の経路を前記第３信号・電源通過回路に選択したときに出力される第３の帯域の信号と電源電圧から第３の帯域の信号を第３の帯域の信号を増幅器側に出力すると共に，電源電圧を分離して第５電源電圧端から出力するする第５電源分離フィルタ，を備え，
前記第５電源重畳フィルタの第５電源電圧端と前記第３電源分離フィルタの第３電源電圧端とを接続することによって，
前記選択手段の経路を前記第３信号・電源通過回路に選択したときは，当該第３信号・電源通過回路を通過した第３の帯域の信号は第３の帯域の信号を増幅する前記増幅回路に入力され，第３信号・電源通過回路を通過した前記電源電圧は，前記第５電源分離フィルタの第５電源電圧端から第３の帯域の信号を増幅する前記増幅回路へ供給されると共に，第３電源重畳フィルタを介して入力端子から出力されるように構成され，
前記第３選択手段の経路を前記遮断回路に選択したときは，第３の帯域の信号を増幅する増幅器に入力される第３の帯域の信号は遮断され，前記電源電圧は第３の帯域の信号を増幅する前記増幅回路と前記入力端子へ供給されないように構成した事を特徴とする請求項４に記載のテレビ受信用増幅装置。
On the input side of the third selection means, a signal in the third band inputted from the input terminal is passed and outputted to the output side, and the power supply voltage inputted from the third power supply voltage terminal is inputted to the input terminal side. A third power superimposing filter to output;
The third band signal output from the third power supply superimposing filter is passed through and output to the third selection means side, and the power supply voltage input from the fourth power supply voltage end is passed through to the third selection means side. A fourth power superimposing filter for outputting,
On the output side of the third selection means,
The third band signal and the third band signal from the third band signal and the power supply voltage that are output when the path of the third selection means is selected by the third signal / power supply passage circuit are supplied to the amplifier side. And a fifth power supply separation filter that separates the power supply voltage and outputs it from the fifth power supply voltage end,
By connecting the fifth power supply voltage terminal of the fifth power supply superimposing filter and the third power supply voltage terminal of the third power supply separation filter,
When the path of the selection means is selected as the third signal / power supply passage circuit, the third band signal that has passed through the third signal / power supply passage circuit amplifies the third band signal. The power supply voltage passed through the third signal / power supply passage circuit is supplied from the fifth power supply voltage end of the fifth power supply separation filter to the amplifier circuit for amplifying the third band signal, It is configured to be output from the input terminal through the third power supply superposition filter,
When the path of the third selection means is selected as the cutoff circuit, the third band signal input to the amplifier for amplifying the third band signal is cut off, and the power supply voltage is 5. The television receiving amplifier according to claim 4, wherein the amplifier is configured not to be supplied to the amplifier circuit for amplifying a signal and the input terminal.
第３の帯域の信号を増幅する前記増幅回路は衛星放送受信用の衛星アンテナからの中間周波数帯の信号を増幅するように構成されたことを特徴とした請求項３に記載のテレビ受信用増幅装置。   4. The television reception amplification according to claim 3, wherein the amplification circuit for amplifying the third band signal is configured to amplify an intermediate frequency band signal from a satellite antenna for satellite broadcast reception. apparatus.

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