JP2002064365A - Automatic tuning receiver - Google Patents
Automatic tuning receiverInfo
- Publication number
- JP2002064365A JP2002064365A JP2000286133A JP2000286133A JP2002064365A JP 2002064365 A JP2002064365 A JP 2002064365A JP 2000286133 A JP2000286133 A JP 2000286133A JP 2000286133 A JP2000286133 A JP 2000286133A JP 2002064365 A JP2002064365 A JP 2002064365A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- receiving
- filter
- reception
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は広帯域受信機（通称
スキャナ）、広帯域受信可能な通信機または盗聴機発
見機、電波探知機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadband receiver (commonly called a scanner), a communication device capable of broadband reception or a wiretap detector, and a radio wave detector.
【０００２】[0002]
【従来の技術】従来の一般的な広帯域選択受信機系統の
構成を第１図に示す。広帯域受信機（通称 スキャナ）
で非常に広範囲な周波数の中から選択同調するために
は、アンテナ１より受波信号をアンプ８で増幅し選択受
信する周波数と中間信号周波数との差または和の高周波
信号を局部発振器ＰＬＬ４５で発生しミクサ１０で混合
し中間周波数に変換後、中間周波数狭帯域フィルタを通
過させ検波、オーディオ増幅を行い受信する。2. Description of the Related Art FIG. 1 shows the configuration of a conventional general wideband selection receiver system. Broadband receiver (commonly called scanner)
In order to select and tune from a very wide range of frequencies, a local oscillator PLL 45 amplifies a received signal from an antenna 1 and generates a high-frequency signal of the difference or sum between the frequency of selective reception and an intermediate signal frequency. After being mixed by the mixer 10 and converted to an intermediate frequency, the signal is passed through an intermediate frequency narrow band filter, detected, audio amplified, and received.
【０００３】前記の周波数変換を行うヘテロダインタイ
プの受信機ではで選択受信するために受波信号に対して
中間信号周波数の差または和の局部発振器ＰＬＬ４５で
発生した信号周波数を混合するため、その局部発振器Ｐ
ＬＬ周波数で中間周波数を生成する影像受波信号も受信
してしまうため、アンテナ１の後段に影像受波信号を遮
断するフィルタを設ける。In the heterodyne-type receiver for performing the frequency conversion, the signal frequency generated by the local oscillator PLL45 of the difference or the sum of the intermediate signal frequencies is mixed with the received signal for selective reception by the local signal. Oscillator P
Since an image reception signal that generates an intermediate frequency at the LL frequency is also received, a filter that blocks the image reception signal is provided downstream of the antenna 1.
【０００４】広帯域の周波数を選択受信するためには、
前記、局部発振器ＰＬＬ４５周波数を受信しようとする
同じ周波数幅だけ大きく変化させ同時に影像周波数遮断
フィルタを選択受信周波数に応じて適切に設定しなけれ
ばいけない。受信する周波数の範囲を広げるほど、影像
周波数遮断フィルタもそれに応じて具備し切替る必要が
ある。In order to selectively receive a broadband frequency,
The local oscillator PLL 45 frequency must be changed greatly by the same frequency width to be received, and at the same time, the image frequency cutoff filter must be appropriately set according to the selected reception frequency. As the range of frequencies to be received is expanded, the image frequency cutoff filter must be provided and switched accordingly.
【０００５】広範囲な周波数の中の任意の受波信号を選
択受信するためには、前記の影像周波数遮断フィルタを
的確に選択する必要があり局部発振器ＰＬＬ４５周波数
の可変変化幅との組合せで、影像周波数遮断フィルタを
切替無しで受信出きる周波数帯域の制約が発生する。In order to select and receive an arbitrary received signal in a wide range of frequencies, it is necessary to appropriately select the above-mentioned image frequency cut-off filter. There is a restriction on the frequency band that can be received without switching the frequency cutoff filter.
【０００６】前記の制約は通常一般的な広帯域受信機
（スキャナー）では、局部発振器ＰＬＬ４５周波数がマ
イクロコンピュータにより制御されるため、予め受波信
号周波数に応じた最適な影像周波数遮断フィルタを制御
プログラムで設定しておき、切替設定して受信する。In general, a general wideband receiver (scanner) controls the frequency of the local oscillator PLL 45 by a microcomputer. Therefore, an optimum image frequency cutoff filter corresponding to a received signal frequency is previously determined by a control program. Set and switch to receive.
【０００７】この方法では、広帯域な周波数の任意の周
波数、または既知の周波数を選択受信する方法に適して
いるが広帯域の中の未知の受波周波数を受信しようとす
る場合、局部発振器ＰＬＬ４５周波数を変化させなが
ら、同時に、その局部発振器ＰＬＬ４５周波数に応じた
影像受波信号を遮断する適切なフィルタを切り替える動
作を未知の受波信号を受信するまで継続しなければなら
ない。広帯域受信機では、この操作を一般的にスキャ
ン、サーチ等の機能名で表現し、受波周波数の周波数帯
に割り当てられている周波数ステップで局部発振器ＰＬ
Ｌ４５周波数と影像受波信号を遮断するフィルタを切替
ながら変化させ検波出力または電界検出信号をマイクロ
コンピュータにより判定しながら受波信号を探す。This method is suitable for a method of selectively receiving an arbitrary frequency in a wide band or a known frequency, but when an unknown reception frequency in a wide band is to be received, the local oscillator PLL 45 frequency is changed. At the same time, the operation of switching an appropriate filter for blocking the image reception signal according to the frequency of the local oscillator PLL 45 must be continued until an unknown reception signal is received. In a broadband receiver, this operation is generally represented by a function name such as scan or search, and the local oscillator PL is assigned in frequency steps assigned to the frequency band of the reception frequency.
The received signal is searched for while changing the L45 frequency and the filter for blocking the image received signal while switching, and determining the detection output or the electric field detection signal by the microcomputer.
【０００８】このため、広帯域の中の受波信号周波数を
検出するためには、順次、受波周波数の周波数帯に割り
当てられている周波数ステップで局部発振器ＰＬＬ４５
周波数と影像受波信号を遮断するフィルタを切替ながら
変化させ検波出力または電界検出信号をマイクロコンピ
ュータにより判定しながら受波信号を探す操作が必要と
なり、非常に時間がかかる。For this reason, in order to detect the reception signal frequency in a wide band, the local oscillator PLL 45 is sequentially set in frequency steps assigned to the reception frequency band.
An operation of searching for a received signal while determining a detection output or an electric field detection signal by a microcomputer by switching and changing a frequency and a filter for blocking an image received signal is required, which is very time-consuming.
【０００９】[0009]
【発明が解決しようとする課題】本発明は、斯かる実情
に鑑み、広帯域受信機（通称 スキャナ）、広帯域受信
可能な通信機または盗聴機発見機、電波探知機で最も電
界強度の大きな未知の受波信号に瞬時に同調し受信する
機能を提供しようとするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is an unknown broadband receiver (commonly known as a scanner), a communication device capable of broadband reception or a wiretap detector, and an electric wave detector having the largest electric field strength. It is intended to provide a function of instantly tuning and receiving a received signal.
【００１０】[0010]
【課題を解決するための手段】本発明のひとつでは、ア
ンテナ１から受波信号を広帯域高周波増幅し、分周器に
より周波数を下げ周波数カウンターで最も電界強度の大
きな未知の受波信号周波数をカウント検出し、その情報
をマイクロコンピュータに送り、その周波数を受信する
ために局部発振器ＰＬＬ４５周波数を制御し影像受波信
号を遮断する最適なフィルタに切替、選択受信し、その
周波数を表示する。また本発明の他のひとつでは、アン
テナ１の後段に帯域を制限するフィルタを具備し、マイ
クロコンピュータで、このフィルタを切替、帯域を制限
して前記と同じ分周器により周波数を下げ周波数カウン
ターで周波数を検出し、その情報をマイクロコンピュー
タに送り、その周波数を受信するために局部発振器ＰＬ
Ｌ４５周波数を制御し影像受波信号を遮断する最適なフ
ィルタに切替、選択受信し、その周波数を表示する。According to one aspect of the present invention, the received signal from the antenna 1 is broadband-high-frequency amplified, the frequency is reduced by a frequency divider, and the frequency of the unknown received signal having the highest electric field strength is counted by a frequency counter. Detect and send the information to the microcomputer, control the local oscillator PLL 45 frequency to receive the frequency, switch to the optimal filter to cut off the image receiving signal, select and receive, and display the frequency. According to another embodiment of the present invention, a filter for limiting the band is provided after the antenna 1. The filter is switched by a microcomputer, the band is limited, the frequency is reduced by the same frequency divider as described above, and the frequency counter is used. Local oscillator PL to detect the frequency, send that information to the microcomputer, and receive that frequency.
Switching to an optimum filter for controlling the L45 frequency to block the image reception signal, selectively receiving the signal, and displaying the frequency.
【００１１】[0011]
【作用】上記手段によれば、以下のような作用が得られ
る。本発明のひとつは、アンテナ１より受波した最も電
界強度の大きな未知の受波信号を直接周波数を調べる事
が出きる為、スキャンまたはサーチ等のステップ毎の局
部発振器ＰＬＬ４５周波数を変化させながら影像受波信
号を遮断するフィルタを順次切替る必要が無く直接最も
電界強度の大きな未知の受波信号を選択受信するために
カウント検知した情報により局部発振器ＰＬＬ４５周波
数を設定出来、影像受波信号を遮断するフィルタも適切
に設定る事が出来るので、瞬時に受波した最も電界強度
の大きな未知の受波信号に同調受信する事が可能にな
り、また同時にカウント検知した情報により周波数も表
示する事が出来る。According to the above means, the following effects can be obtained. One of the aspects of the present invention is to directly examine the frequency of an unknown received signal having the largest electric field strength received from the antenna 1, so that the image is obtained by changing the frequency of the local oscillator PLL45 for each step such as scan or search. It is not necessary to switch the filter that cuts off the received signal sequentially, and the frequency of the local oscillator PLL 45 can be set based on the information detected by counting to directly receive the unknown received signal with the highest electric field strength, and the image received signal is cut off. Filter can also be set appropriately, so it is possible to tune in to the unknown received signal with the largest electric field strength received instantaneously, and at the same time, display the frequency based on the information detected by counting. I can do it.
【００１２】また本発明の他のひとつは、帯域制限を行
うフィルタを通して周波数を検出するためその帯域内で
の最も電界強度の大きな受波信号を検出出来、別な帯域
ある強力な電界強度の受波信号を排除出来る為、検出の
感度を上げる事が出来る。Another aspect of the present invention is to detect a frequency through a filter for limiting a band, so that a received signal having the largest electric field strength in the band can be detected, and a receiving signal having a strong electric field strength in another band can be detected. Since the wave signal can be eliminated, the sensitivity of detection can be increased.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図示
例と共に説明する。図２〜図３は発明を実施する形態の
一例であって、図中、図と同一の符号を付した部分は同
一物を表わしており、基本的な構成は図１に示す従来の
ものと同様であるが、本図示例の特徴とするところは、
図２に示す如く、広帯域の周波数検出計測部を具備した
点にある。Embodiments of the present invention will be described below with reference to the drawings. 2 to 3 show an example of the embodiment of the present invention. In the drawings, portions denoted by the same reference numerals as those in the drawings represent the same components, and the basic configuration is the same as that of the conventional one shown in FIG. The same is true, but the features of this illustrated example are:
As shown in FIG. 2, a point is that a broadband frequency detection and measurement unit is provided.
【００１４】次に、上記図示例の作動を説明する。図２
のアンテナ１は受波高周波信号を取り込み切替器２及び
高周波増幅ＲＦアンプ６５に信号を送る。分周器７０
は、高周波信号を周波数カウンタでカウント可能な周波
数まで分周して受波信号周波数を下げる。周波数カウン
タ７５は分周された受波信号をカウントし周波数を調べ
る。基準発振器４０からカウントするための基準信号が
周波数カウンタ７５内で分周されゲートタイムを作る。
電界強度検出回路８０はＲＦアンプ６５から受波信号を
分岐入力し電界強度を計測しマイクロコンピュータ５０
へ情報を送る。マイクロコンピュータ５０は局部発振器
ＰＬＬ回路４５の制御、フィルタ切替器２の制御、周波
数カウンタ７５の情報受け取り及び制御、表示器６０の
制御、その他の受信操作に必要な制御を受け持つ。また
操作部８５で、マイクロコンピュータに制御操作を指令
する。Next, the operation of the above illustrated example will be described. FIG.
The antenna 1 receives the received high-frequency signal and sends the signal to the switch 2 and the high-frequency amplification RF amplifier 65. Divider 70
Reduces the frequency of a received signal by dividing the frequency of a high-frequency signal to a frequency that can be counted by a frequency counter. The frequency counter 75 counts the frequency-divided received signal and checks the frequency. A reference signal for counting from the reference oscillator 40 is divided in the frequency counter 75 to generate a gate time.
The electric field strength detection circuit 80 branches and inputs the received signal from the RF amplifier 65, measures the electric field strength, and
Send information to The microcomputer 50 is responsible for controlling the local oscillator PLL circuit 45, controlling the filter switch 2, receiving and controlling the information of the frequency counter 75, controlling the display 60, and other controls necessary for the receiving operation. The operation unit 85 instructs the microcomputer to perform a control operation.
【００１５】フィルター３は影像受波信号を遮断するた
めの帯域フィルタで、受信する周波数帯域幅、局部発振
器ＰＬＬ４５の周波数変化幅、混合ミクサ１０への和ま
たは差に相当する周波数の組み合わせ方によりフィルタ
の個数、フィルタ帯域幅も変わる。ＲＦアンプ８は影像
受波信号をフィルタリングされた受波信号を増幅する。
場合によってはこのＲＦアンプ８が必要無いシステムも
ある。ミキサ１０は受波信号と局部発振器ＰＬＬ回路４
５からの信号を混合し中間信号周波数に変換する。ＩＦ
フィルタ１５は、狭帯域特性をもったフィルタでミクサ
１０で変換された無数の信号の中から中間周波数に一致
する周波数のみ取り出しＩＦアンプ２０で中間周波数に
変換された信号を増幅する。The filter 3 is a band-pass filter for cutting off the image reception signal, and is determined by a combination of a frequency bandwidth to be received, a frequency change width of the local oscillator PLL 45, and a frequency corresponding to the sum or difference to the mixing mixer 10. And the filter bandwidth also changes. The RF amplifier 8 amplifies the reception signal obtained by filtering the image reception signal.
In some cases, this system does not require the RF amplifier 8. The mixer 10 receives the received signal and the local oscillator PLL circuit 4.
5 are mixed and converted to an intermediate signal frequency. IF
The filter 15 takes out only the frequency that matches the intermediate frequency from among the innumerable signals converted by the mixer 10 with a filter having a narrow band characteristic, and amplifies the signal converted to the intermediate frequency by the IF amplifier 20.
【００１６】検波器２５では、中間周波数信号を検波し
ＡＦアンプ３０で増幅しスピーカ３５で受信信号を出力
する。表示器６０はマイクロコンピュータ５０より制御
され、周波数カウンタ７５からの情報、その他の受信機
の状態表示を行う。The detector 25 detects the intermediate frequency signal, amplifies the signal with the AF amplifier 30, and outputs the received signal with the speaker 35. The display 60 is controlled by the microcomputer 50 and displays information from the frequency counter 75 and other statuses of the receiver.
【００１７】次に上記した実施例の動作を説明する。ユ
ーザーが未知の受波信号を受信したい場合操作部８５か
ら、通常の受信モードから自動同調受信モードに切り替
わる操作キーを選択入力するとマイクロコンピュータ５
０は、ＲＦアンプ８、ミキサ１０、ＩＦフィルタ１５、
ＩＦアンプ２０の機能停止制御を行い消費電力を削減す
る。同時に切替器２でフィルター３を切り離す。Next, the operation of the above embodiment will be described. When the user wishes to receive an unknown received signal, the operation unit 85 selects and inputs an operation key for switching from the normal reception mode to the automatic tuning reception mode.
0 is an RF amplifier 8, a mixer 10, an IF filter 15,
The function stop control of the IF amplifier 20 is performed to reduce power consumption. At the same time, the filter 3 is separated by the switch 2.
【００１８】マイクロコンピュータ５０は、同時にＲＦ
アンプ６５、分周器７０、周波数カウンタ７５、電界強
度検出回路８０に電源供給するよう制御し機能を動作さ
せる。アンテナ１より受波した信号はＲＦアンプ６５で
増幅され分周器７０及び電界強度検出回路８０へ導かれ
る。電界強度検出回路８０で電界強度を測定し、検出し
た値をマイクロコンピュータ５０へ送る。マイクロコン
ピュータ５０は予め設定された電界強度値と比較を行い
十分周波数カウント可能なレベルに達したと判断して周
波数カウンタ７５からの情報を取り込む。電界強度検出
回路の測定情報との併用または電界強度検出回路の測定
情報を使わず周波数カウンタ７５からの情報を多数取り
込み、数回一致検出を行い正常に周波数カウントした情
報かを判断するようにプログラムしておき雑音による誤
動作を防止する。分周器７０は、周波数カウンタ７５で
カウント可能な周波数まで周波数を下げる。周波数安定
度に優れた正確な基準発振器４０より周波数カウンタ７
５へ高周波信号を送りカウンタ部で分周し周波数カウン
トするためのゲートタイムを作り、受波信号を分周器７
０で下げられた周波数をカウントする。カウントした情
報をマイクロコンピュータ５０に送る。The microcomputer 50 simultaneously operates the RF
The function is controlled by supplying power to the amplifier 65, the frequency divider 70, the frequency counter 75, and the electric field strength detection circuit 80. The signal received from the antenna 1 is amplified by the RF amplifier 65 and guided to the frequency divider 70 and the electric field strength detection circuit 80. The electric field intensity is measured by the electric field intensity detection circuit 80, and the detected value is sent to the microcomputer 50. The microcomputer 50 compares the electric field strength value with a preset electric field strength value, determines that the level has reached a level at which the frequency can be sufficiently counted, and takes in the information from the frequency counter 75. A program that uses a large amount of information from the frequency counter 75 together with the measurement information of the electric field strength detection circuit or without using the measurement information of the electric field strength detection circuit, performs coincidence detection several times, and determines whether the information has been correctly frequency-counted. In addition, malfunction due to noise is prevented. The frequency divider 70 reduces the frequency to a frequency that can be counted by the frequency counter 75. Frequency counter 7 from accurate reference oscillator 40 with excellent frequency stability
5, a high-frequency signal is sent to the frequency divider 7 to divide the frequency by the counter section, and to make a gate time for frequency counting.
Count the frequency reduced by zero. The counted information is sent to the microcomputer 50.
【００１９】受波信号の周波数を知るためには周波数カ
ウンタ７５のゲートタイム時間とカウントされた値と分
周器７０の分周比により算出出来る。受波信号周波数を
ｆとすると 分周値をｎとし ゲートタイムをｔ カウ
ント値をｃとすると ｆ＝ｃ× ｎ ÷ ｔで 受信周
波数を知る事が出来る。The frequency of the received signal can be calculated from the gate time of the frequency counter 75, the counted value, and the frequency division ratio of the frequency divider 70. Assuming that the received signal frequency is f, the dividing value is n, the gate time is t, and the count value is c, the receiving frequency can be known by f = c × n ÷ t.
【００２０】こうして、高周波信号周波数カウント手段
と、周波数カウント手段によって得られた周波数に設定
する事が出来る受信復調手段を備える事により瞬時にも
っとも強力な外来電波を受信する事が出来る。尚、本発
明の自動同調受信機は、上述の図示例にのみ限定される
ものではなく、本発明の要旨を逸脱しない範囲内におい
て種々変更を加え得ることは勿論である。Thus, the provision of the high frequency signal frequency counting means and the receiving and demodulating means capable of setting the frequency obtained by the frequency counting means makes it possible to receive the most powerful external radio wave instantaneously. It should be noted that the automatic tuning receiver of the present invention is not limited to the illustrated example described above, and it is needless to say that various changes can be made without departing from the gist of the present invention.
【発明の効果】以上、説明したように本発明の請求項１
〜２記載の外来電波を受信して高周波信号に変換するた
めの受信用アンテナと、前記受信用アンテナによって得
られた高周波信号を受信復調するための受信復調手段
と、前記受信復調手段に入力される複数の高周波信号の
中で最も強い高周波信号の周波数をカウントするための
周波数カウント手段と、前記受信復調手段の受信周波数
を前記周波数カウント手段により得られた周波数に設定
するための制御手段とを備えたことを特徴とする受信機
及び受信用アンテナと受信復調手段の間に、限定された
周波数帯域のみを通過させるための複数の帯域フィルタ
と、前記複数の帯域フィルタの内の一つを選択するため
の切替手段とを有する受信機によれば、未知の外来電波
を受信復調するために従来の受信機では、受信周波数を
変化させながら受信復調出来るまで継続する必要があり
受信復調まで長時間を要したが、請求項１〜２の方法に
より瞬時に受信可能という優れた効果を奏し得る。また
自動的に受信可能となるため一般の人でも容易に操作受
信可能となり、また複雑に周波数が変化する電波にも自
動で追従可能な受信機を作る事が出来る。As described above, the first aspect of the present invention is as described above.
2, a receiving antenna for receiving and converting the external radio wave into a high-frequency signal, a receiving and demodulating means for receiving and demodulating the high-frequency signal obtained by the receiving antenna, and a signal inputted to the receiving and demodulating means. Frequency counting means for counting the frequency of the strongest high-frequency signal among the plurality of high-frequency signals, and control means for setting the reception frequency of the reception demodulation means to the frequency obtained by the frequency counting means. A plurality of bandpass filters for passing only a limited frequency band between the receiver and the receiving antenna and the reception demodulation means, and selecting one of the plurality of bandpass filters According to the receiver having the switching means for receiving and demodulating an unknown external radio wave, the conventional receiver receives the signal while changing the reception frequency. Although it took a long time until must receive demodulation to continue to be regulated, an excellent effect can be received instantly by the method of claim 1-2. In addition, since automatic reception is possible, ordinary people can easily perform operation reception, and a receiver that can automatically follow radio waves whose frequency changes in a complicated manner can be manufactured.
【図１】従来の一般的な受信機ブロック図である。FIG. 1 is a block diagram of a conventional general receiver.
【図２】本発明の請求項１実施例の受信機ブロック図で
ある。FIG. 2 is a block diagram of a receiver according to the first embodiment of the present invention.
【図３】本発明の請求項２実施例の受信機ブロック図で
ある。FIG. 3 is a block diagram of a receiver according to a second embodiment of the present invention.
１ アンテナ ２ フィルタ切替器 ３ フィルタ ８ ＲＦアンプ １０ ミキサ １５ ＩＦフィルタ ２０ ＩＦアンプ ２５ 検波器 ３０ ＡＦアンプ ３５ スピーカ ４０ 基準周波数発生器 ４５ ＰＬＬ回路 ５０ マイクロコンピュータ部 ６０ 表示器 ６５ ＲＦアンプ ７０ 分周器 ７５ 周波数カウンタ部 ８０ 電界強度検出部 DESCRIPTION OF SYMBOLS 1 Antenna 2 Filter switch 3 Filter 8 RF amplifier 10 Mixer 15 IF filter 20 IF amplifier 25 Detector 30 AF amplifier 35 Speaker 40 Reference frequency generator 45 PLL circuit 50 Microcomputer part 60 Display 65 RF amplifier 70 Frequency divider 75 Frequency counter 80 Electric field strength detector
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5J103 AA11 CB00 CB01 DA05 DA16 DA20 DA38 DA41 FA04 5K020 AA00 DD26 EE00 FF04 GG01 HH13 KK07 NN10 5K061 AA00 BB00 CC00 CC11 CC14 CC45 GG09 JJ06 JJ24 5K062 AA00 AB12 AC02 AC06 AG01 BA01 BC03 BC11 BE00 BE08 BE12 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 5J103 AA11 CB00 CB01 DA05 DA16 DA20 DA38 DA41 FA04 5K020 AA00 DD26 EE00 FF04 GG01 HH13 KK07 NN10 5K061 AA00 BB00 CC00 CC11 CC14 CC45 GG09 JJ06 JJ24 5K062 AC03 BC01 BE00 BE08 BE12
Claims (2)
るための受信用アンテナと、前記受信用アンテナによっ
て得られた高周波信号を受信復調するための受信復調手
段と、前記受信復調手段に入力される複数の高周波信号
の中で最も強い高周波信号の周波数をカウントするため
の周波数カウント手段と、前記受信復調手段の受信周波
数を前記周波数カウント手段により得られた周波数に設
定するための制御手段とを備えたことを特徴とする受信
機。1. A receiving antenna for receiving an external radio wave and converting it into a high-frequency signal, receiving demodulating means for receiving and demodulating a high-frequency signal obtained by the receiving antenna, and inputting the signal to the receiving demodulating means. Frequency counting means for counting the frequency of the strongest high-frequency signal among the plurality of high-frequency signals to be controlled, and control means for setting the reception frequency of the reception demodulation means to the frequency obtained by the frequency counting means, A receiver comprising:
限定された周波数帯域のみを通過させるための複数の帯
域と、前記複数の帯域フィルタの内の一つを選択するた
めの切替手段とを有する請求項１記載の受信機。2. Between a receiving antenna and a receiving demodulation means,
The receiver according to claim 1, further comprising a plurality of bands for passing only a limited frequency band, and switching means for selecting one of the plurality of band filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000286133A JP3910350B2 (en) | 2000-08-17 | 2000-08-17 | Automatic tuning receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000286133A JP3910350B2 (en) | 2000-08-17 | 2000-08-17 | Automatic tuning receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002064365A true JP2002064365A (en) | 2002-02-28 |
| JP3910350B2 JP3910350B2 (en) | 2007-04-25 |
Family
ID=18770100
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000286133A Expired - Lifetime JP3910350B2 (en) | 2000-08-17 | 2000-08-17 | Automatic tuning receiver |
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| Country | Link |
|---|---|
| JP (1) | JP3910350B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002009646A (en) * | 2000-05-04 | 2002-01-11 | Sagem Sa | Multi-band narrow frequency band wireless receiver for automobile data |
| WO2003075473A1 (en) * | 2002-03-05 | 2003-09-12 | Sharp Kabushiki Kaisha | Receiver apparatus |
-
2000
- 2000-08-17 JP JP2000286133A patent/JP3910350B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002009646A (en) * | 2000-05-04 | 2002-01-11 | Sagem Sa | Multi-band narrow frequency band wireless receiver for automobile data |
| WO2003075473A1 (en) * | 2002-03-05 | 2003-09-12 | Sharp Kabushiki Kaisha | Receiver apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3910350B2 (en) | 2007-04-25 |
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