JPS58172024A - Power supply device for community reception - Google Patents
Power supply device for community receptionInfo
- Publication number
- JPS58172024A JPS58172024A JP5563082A JP5563082A JPS58172024A JP S58172024 A JPS58172024 A JP S58172024A JP 5563082 A JP5563082 A JP 5563082A JP 5563082 A JP5563082 A JP 5563082A JP S58172024 A JPS58172024 A JP S58172024A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- circuit
- amplifier
- television
- power
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1607—Supply circuits
Abstract
Description
【発明の詳細な説明】
本発明はＦＭ、テレビ放送等の共同受信に用いられる電
源装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device used for joint reception of FM, television broadcasting, etc.
今日のように電力消費の節約が叫ばれている時節におい
て、テレビ共同受信に用いられている機器の多くは、深
夜者チャンネルのテレビ放送が終了した後においても機
器内部の周波数変換回路、発振回路、増幅回路、減衰回
路等に電力が供給され、全く無駄な電力消費が行なわれ
ている。しかもそれらの電力は貴重な商用電源によって
いる。In today's era when saving power consumption is called for, many of the devices used for communal television reception are still operating even after late-night channel television broadcasts have ended. , amplifier circuits, attenuation circuits, etc., resulting in completely unnecessary power consumption. What's more, all of that power comes from precious commercial power sources.
本発明はかかる無駄を除去するとともに、その無駄の除
去によって機器自体の寿命をも伸ばし、更にはＦＭやテ
レビ信号を高品位で出力し得るようにしだ共同受信用電
源装置を提供しようとするものである。The present invention aims to eliminate such waste, extend the life of the equipment itself by eliminating such waste, and provide a power supply device for community reception that can output FM and television signals in high quality. It is.
以下本願の実施例を示す図面について説明する。The drawings showing the embodiments of the present application will be described below.
第１図はテレビ共同受信施設の受信点装置の一例を示す
略示図、第２図はその装置のブロック図を示すもので、
両図において対応するものには同一の符号を付して示し
である。■は受信用アンテナで、放送塔３３からのテレ
ビ放送波を受信するものであり、チャンネル専用型のも
の、広帯域型のもの等必要に応じて種々用いられる０２
は通称ヘッドアンプと称せられる受信増幅器で、各チャ
ンネル専用増幅器、あるいはテレビチャンネル変換器等
を内部に備えている。２０は該受信増幅器の入力端、２
１は出力端、２２は電源端をそれぞれ示す。Fig. 1 is a schematic diagram showing an example of a reception point device of a television communal reception facility, and Fig. 2 is a block diagram of the device.
Corresponding parts in both figures are designated by the same reference numerals. 02 is a receiving antenna that receives television broadcast waves from the broadcasting tower 33, and can be used in various ways as needed, such as a channel-specific type or a wideband type.
is a receiving amplifier commonly called a head amplifier, and is equipped with an amplifier dedicated to each channel or a TV channel converter. 20 is the input terminal of the receiving amplifier;
1 indicates an output end, and 22 indicates a power supply end.
３は検知部として例示する広帯域アンテナで、その受信
帯域は、図示したテレビ共同受信施設において受信され
るべき放送波すべてが受信・可能な帯域に選ばれている
。ただしその感度は、放送波が届いているかいないかの
判別が可能な程度のものでよい。４は太陽電池を示し、
シリコン、 ＧａＡｓ。Reference numeral 3 denotes a wideband antenna exemplified as a detection unit, and its reception band is selected to be a band in which all broadcast waves to be received in the illustrated television common reception facility can be received. However, the sensitivity may be such that it is possible to determine whether broadcast waves are being received or not. 4 indicates a solar cell;
Silicon, GaAs.
ＣｄＳ 、 ＣｄＴｅ太陽電池等が用いられる。該太陽
電池４は太陽光３４が届いている時間帯には受信増幅器
２動作用の起電力を発生するとともに後述の蓄７と蓄電
池８を内部に備えている。上記蓄電池８としては過充電
、過放電によって損失されにくいニッケル・カドミウム
蓄電池を用いることが適切であるが、その他の蓄電池（
２次電池）例えば鉛蓄電池等を用いることもできる。９
は上記太陽電池４および蓄電装置６によって構成される
電源部を示す。１０は電源開閉装置で、電源部９からの
直流を受信用増幅器２へ供給したり、あるいはその供給
を断ったりするものである。該電源開閉装置１０におい
て、１１は検知用信号入力端で広帯域アンテナ３で受信
した信号が入力される。１２は第１電源端子で電源部９
に接続されている。１３は第２電源端子で受信増幅器２
に接続されている。１４は増幅回路で、広帯域アンテナ
３において受信されたテレビ信号を増幅する。１５は検
波回路で、増幅回路１４からの信号を検波するために用
いられる。１６はレベル判別部で、上記テレビ信号が無
く々つで自体への入力信号がある一定値以下になると出
力信号を生ずるように構成されたものである。該レベル
判別部には例えばシュミット・トリガ回路が用いられる
。１７はリレー作動回路で、レベル判別部１６からの信
号に応じてリレー１８を作動させるようにしたものであ
る。１９はリレー１８の接点で、レベル判別部１６から
の信号に応じて接点１９ａ側、あるいは接点１９ｂ側に
切替わるものである。次に２３は各受信用アンテナの給
電部２４と受信増幅器２０入力端２０とを接続するだめ
の給電線を示すもので、主として同軸ケーブルが用いら
れる。同様に２５はテレビ放送波があるか無いか検知す
るだめの検知用広帯域アンテナ３の給電部２６と電源開
閉装置１０の入力端１１とを接続するだめの給電線を示
すもので、主として同軸ケーブルが用いられる。２７．
２８゜２９は電源電流を伝送するための伝送線で、それ
ぞれケーブルが用いられる。３０は受信増幅器２の出力
端２１と受信施設内のテレビ受像機あるいは後段の受信
用機器とを接続するだめの伝送線で、主として同軸ケー
ブルが用いられる。尚、３１は機器取付用の支柱、３２
はアンテナ取付用の支柱を示す。CdS, CdTe solar cells, etc. are used. The solar cell 4 generates an electromotive force for operating the reception amplifier 2 during the time period when sunlight 34 reaches the solar cell 4, and also includes a storage 7 and a storage battery 8, which will be described later. As the storage battery 8, it is appropriate to use a nickel-cadmium storage battery that is not easily damaged by overcharging or overdischarging, but other storage batteries (
(Secondary battery) For example, a lead-acid battery or the like can also be used. 9
indicates a power supply unit constituted by the solar cell 4 and the power storage device 6. Reference numeral 10 denotes a power switching device that supplies direct current from the power supply section 9 to the receiving amplifier 2 or cuts off the supply. In the power switchgear 10, a detection signal input terminal 11 receives a signal received by the broadband antenna 3. 12 is the first power supply terminal and the power supply section 9
It is connected to the. 13 is the second power supply terminal for receiving amplifier 2.
It is connected to the. 14 is an amplifier circuit that amplifies the television signal received by the wideband antenna 3. A detection circuit 15 is used to detect the signal from the amplifier circuit 14. Reference numeral 16 denotes a level determination section which is configured to generate an output signal when the television signal is not present and the input signal to itself falls below a certain value. For example, a Schmitt trigger circuit is used for the level determination section. Reference numeral 17 denotes a relay operating circuit which operates the relay 18 in response to a signal from the level determining section 16. Reference numeral 19 denotes a contact of the relay 18, which is switched to the contact 19a side or the contact 19b side depending on the signal from the level determination section 16. Next, reference numeral 23 denotes a power feed line that connects the power feed section 24 of each reception antenna and the input terminal 20 of the reception amplifier 20, and a coaxial cable is mainly used. Similarly, 25 indicates a power feed line that connects the power feed section 26 of the detection broadband antenna 3, which detects whether there is a TV broadcast wave, and the input end 11 of the power switchgear 10, and is mainly a coaxial cable. is used. 27.
28 and 29 are transmission lines for transmitting power supply current, and cables are used for each. 30 is a transmission line for connecting the output end 21 of the receiving amplifier 2 and a television receiver in a receiving facility or a subsequent receiving device, and a coaxial cable is mainly used. In addition, 31 is a support for installing equipment, 32
indicates the support for antenna mounting.
上記構成のものは、受信用アンテナ１．受信増幅器２が
取付けられている既設のテレビ共同受信施設に、単に太
陽電池４．広帯域アンテナ３．蓄電装置６．電源開閉装
置１０を付加するだけの簡単な構成である。また、電源
部９として太陽電池４と蓄電池８を用いているから商用
電源の電線路とテレビ共同受信とが接続される必要が無
く、従って送電線、配電線等から落雷、誘導雷による異
常電圧が共同受信施設に侵入して機器を破壊することが
防止できる。In the above configuration, receiving antenna 1. Simply add a solar cell 4. Wideband antenna 3. Power storage device 6. This is a simple configuration that only requires the addition of a power switch 10. In addition, since the solar battery 4 and the storage battery 8 are used as the power supply unit 9, there is no need to connect the commercial power supply line and the TV common reception, and therefore abnormal voltage due to lightning strikes or induced lightning from the power transmission line, distribution line, etc. This prevents people from invading the communal reception facility and destroying equipment.
以上の構成のものにおいて、種々の動作環境下における
電源装置の動作について説明する。尚下記各場合におい
て、蓄電池８には充分な充電がなされているものとし、
電源開閉装置１０における増幅回路１４、レベル判別部
１６、リレー作動回路１７は常に正常動作状態にあるも
のとする０
（１）テレビ放送が行なわれている場合（ＩＡ）昼で日
照がある場合
太陽電池４には起電力が発生して蓄電池８が充電される
と共に、電源部９からは電源開閉装置１０の第１電源端
子１２に対して電源電流が流れる。一方、放送波の有無
検知用の広帯域アンテナ３においては放送波が受信され
電源開閉装置１０の検知用信号入力端１１に入力される
。この受信信号は広帯域増幅器１４において増幅され、
検波回路１５で検波され、所定の値以上のレベルの信号
となってレベル判別部１６に入力される。レベル判別部
１６においては出力信号を生じず、その結果リレー作動
回路１７がリレー１８を作動させ、リレー接点１９が接
点１９ｂ側で安定する。このようにして電源部９からの
電源電流が電源開閉装置１０の第２電源端子Ｉ３から受
信増幅器２に流れ、該受信増幅器２はアンテナ１で受信
された放送波のテレビ信号を各チャンネル毎にレベル調
節・増幅処理して後段の施設へ送出する。この結果受信
施設内の各テレビ受像機においては高品質の画像でテレ
ビを楽しむことができる。With the above configuration, the operation of the power supply device under various operating environments will be explained. In each case below, it is assumed that the storage battery 8 is sufficiently charged.
It is assumed that the amplifier circuit 14, level discrimination unit 16, and relay operating circuit 17 in the power switchgear 10 are always in a normal operating state. An electromotive force is generated in the battery 4 and the storage battery 8 is charged, and a power supply current flows from the power supply section 9 to the first power supply terminal 12 of the power supply switching device 10. On the other hand, the broadband antenna 3 for detecting the presence or absence of broadcast waves receives the broadcast waves and inputs them to the detection signal input terminal 11 of the power switchgear 10 . This received signal is amplified in a wideband amplifier 14,
The signal is detected by the detection circuit 15, becomes a signal with a level equal to or higher than a predetermined value, and is input to the level determination section 16. The level determination unit 16 does not generate an output signal, and as a result, the relay activation circuit 17 activates the relay 18, and the relay contact 19 is stabilized on the contact 19b side. In this way, the power supply current from the power supply section 9 flows from the second power supply terminal I3 of the power switchgear 10 to the reception amplifier 2, and the reception amplifier 2 receives the broadcast wave television signal received by the antenna 1 for each channel. It is level-adjusted and amplified before being sent to subsequent facilities. As a result, each television receiver in the reception facility can enjoy television with high quality images.
（ＩＢ）日照のない昼、または夜の場合太陽電池４では
起電力を生じず、蓄電池８の放電によって電源部９から
電源開閉装置１０の第１電源端子１２に対して電源電流
が流れる。以下（ＩＡ）の場合と同様にして、受信増幅
器２に対して電源電流が供給される。(IB) During the day or night when there is no sunlight, the solar cell 4 does not generate an electromotive force, and a power supply current flows from the power supply section 9 to the first power supply terminal 12 of the power switchgear 10 due to discharge of the storage battery 8. The power supply current is supplied to the receiving amplifier 2 in the same manner as in the case (IA) below.
（２）テレビ放送が行なわれていない場合（２Ａ）昼で
日照がある場合
太陽電池４には起電力が発生して蓄電池８が充電される
と共に、電源部９からは電源開閉装置１０の第１電源端
子１２に対して電源型−流が流れる。一方、広帯域アン
テナ３においては放送波が受信されず、広帯域増幅器１
４においてもノイズしか増幅されず、検波回路１５にお
ける検波出力は所定の値以下のレベルである。レベル判
別部１６では出力信号が生じ、リレー作動回路１７はリ
レー接点１９が接点１９ａ側になるようにリレー１８を
作動させる。このようにして電源開閉装置１０の第２電
源端子１３からは電源電流が供給されず、受信増幅器２
において無駄な電力消費が行なわれるのを防止できる。(2) When there is no television broadcasting (2A) When there is sunlight in the daytime An electromotive force is generated in the solar cell 4 and the storage battery 8 is charged. A power supply type current flows to the power supply terminal 12. On the other hand, the broadband antenna 3 does not receive broadcast waves, and the broadband amplifier 1
4, only noise is amplified, and the detection output in the detection circuit 15 is at a level below a predetermined value. An output signal is generated in the level determination section 16, and the relay activation circuit 17 activates the relay 18 so that the relay contact 19 is on the contact 19a side. In this way, no power supply current is supplied from the second power supply terminal 13 of the power switchgear 10, and the receiving amplifier 2
It is possible to prevent unnecessary power consumption.
（２Ｂ）日照のない昼、捷たけ夜の場合太陽電池４では
起電力を生じず、蓄電池８の放電によって電源開閉装置
ＩＯにおける各部を動作させるだめの電流が流れる。以
下（２Ａ）の場合と同様にして受信増幅器２に電源電流
が供給されず、無駄な電力消費を防止できる。(2B) In the case of a day without sunlight or a dark night, the solar cell 4 does not generate an electromotive force, and the discharge of the storage battery 8 causes a current to flow to operate each part of the power switchgear IO. Similarly to the case (2A) below, no power supply current is supplied to the receiving amplifier 2, and wasteful power consumption can be prevented.
尚、以上の説明で明らかなように、レベル判別部１６に
おいて判別に用いられる所定の一定値レベルとは、受信
施設において放送されている放送波のうちで最も弱く広
帯域アンテナで受信される放送波の検波出力レベルと、
ノイズの検波出力レベルとの間に設定される。As is clear from the above explanation, the predetermined constant value level used for discrimination in the level discriminator 16 is the weakest of the broadcast waves broadcast at the receiving facility, which is received by the wideband antenna. The detection output level of
Set between the noise detection output level and the noise detection output level.
次に第３図はテレビ共同受信施設における線路増幅装置
の一例を示す略示図で、前図と同一あるいは均等機能の
ものには同一の符号にアルファベットのｅを付して示し
重複する説明を省略する。Next, Fig. 3 is a schematic diagram showing an example of a line amplifying device in a television common reception facility. Items with the same or equivalent functions as those in the previous figure are indicated with the same reference numerals followed by the letter e, and redundant explanations will be omitted. Omitted.
３５は線路増幅器で、幹線増幅器、幹線分岐増幅器等様
々の増幅器が用いられる。３６はテレビ信号の入力端、
３７は出力端、３８は電源端を示す。３９．４０は伝送
線で例えば同軸ケーブルが用いられる。伝送線３９は線
路増幅器３５と前段のテレビ受信用機器とを接続するた
めに、また伝送線４０は線路増幅器３５と後段のテレビ
受信用機器とを接続するためにそれぞれ用いられる。35 is a line amplifier, and various amplifiers such as a main line amplifier, a main line branch amplifier, etc. are used. 36 is a TV signal input end;
37 is an output end, and 38 is a power supply end. 39.40 is a transmission line, for example, a coaxial cable is used. The transmission line 39 is used to connect the line amplifier 35 and the preceding television receiving equipment, and the transmission line 40 is used to connect the line amplifier 35 and the succeeding television receiving equipment.
尚、以上は電源開閉装置１０．］Ｏｅにおける検知用信
号入力端１１．ｌｌｅに広帯域アンテナ３，３ｅを接続
した例を示したが、伝送線２３．３９あるいは伝送線３
０．４０にテレビ放送波抽出用の分岐器や分配器を介設
し、分岐・分配出力を検知用信号入力端ＩＩ、 ｌｉ
ｅに入力するようにしてもよい。The above is the power switchgear 10. ]Detection signal input terminal 11 at Oe. An example is shown in which broadband antennas 3 and 3e are connected to lle, but transmission line 23.39 or transmission line 3
A brancher or distributor for extracting TV broadcast waves is installed at 0.40, and the signal input terminal II, li is used to detect the branch/distribution output.
It is also possible to input the information to e.
また、前記受信増幅器２．あるいは線路増幅器３５とし
てコイルとコンデンサを組合わせて構成された電源分離
回路を備えたものを用いれば、前段・後段の受信用機器
に対しても電源電流を送ることができる。Further, the receiving amplifier 2. Alternatively, if a line amplifier 35 equipped with a power supply separation circuit configured by combining a coil and a capacitor is used, the power supply current can also be sent to the receiving equipment at the front and rear stages.
次に第４図は異なる構成の電源装置を示す斜視図で、前
図と同一あるいは均等機能のものには同一の符号にアル
ファベットのｆを付して重複する説明を省略する。４１
は電源装置主要部を収納するケース本体で、内部には蓄
電装置６ｆ、電源開閉装置１０ｆ、各部を接続するケー
ブル４６が収納されている。４２はケース蓋体を示す。Next, FIG. 4 is a perspective view showing a power supply device having a different configuration, and parts having the same or equivalent functions as those in the previous figure are given the same reference numerals and the letter f, and redundant explanation will be omitted. 41
1 is a case main body that houses the main parts of the power supply device, and inside thereof, a power storage device 6f, a power supply switching device 10f, and a cable 46 that connects each part are housed. 42 indicates a case lid body.
４３は放送波の有無を検知する検知用の信号が入力され
る入力端子で、外部の広帯域アンテナあるいは分岐器等
の分岐端に接続される。尚、ケース本体４１内部ではケ
ーブル４６によって電源開閉装置１０ｆの検知用信号入
力端１１ｆと接続されている。４４は太陽電池接続端子
で、ケース本体４１内部では蓄電装置に接続されている
０４５は電源供給端子を示し、ケース外部に設置される
増幅器等の共同受信用機器の電源端に接続される。尚ケ
ース本体４１内部ではケーブル４６によって電源開閉装
置］Ｏｆの第２電源端子１３ｆに接続されている。Reference numeral 43 denotes an input terminal into which a detection signal for detecting the presence or absence of broadcast waves is input, and is connected to an external broadband antenna or a branch end of a branching device. Note that inside the case body 41, it is connected to the detection signal input terminal 11f of the power switch 10f by a cable 46. Reference numeral 44 denotes a solar cell connection terminal, and 045 indicates a power supply terminal, which is connected to a power storage device inside the case body 41, and is connected to a power supply terminal of a communal reception device such as an amplifier installed outside the case. Inside the case body 41, the cable 46 is connected to the second power terminal 13f of the power switching device]Of.
第４図の構成のものは、蓄電装置６ｆ、電源開閉装置１
０ｆを一ケース内に収納したので、支柱等に取付は易く
なっている。The configuration shown in Fig. 4 includes a power storage device 6f, a power switchgear 1
Since the 0f is housed in one case, it is easy to attach it to a pole or the like.
以上のように本願にあっては、放送が行なわれている場
合には電源部からの電源電流を放送受信用の各機器に供
給し、放送が最後の一波も停止した場合には上記電源電
流の供給を断つようにしであるから、無駄な電力消費を
防止でき、受信用機器の寿命を伸ばすことができる。As described above, in the present application, when broadcasting is being performed, power supply current from the power supply section is supplied to each device for receiving broadcasting, and when the last wave of broadcasting has stopped, the power supply Since the current supply is cut off, wasteful power consumption can be prevented and the life of the receiving equipment can be extended.
しかも電源部は太陽電池と蓄電池により構成されている
から、貴重な商用電源のロスを防止できる。Moreover, since the power supply section is composed of a solar cell and a storage battery, loss of valuable commercial power can be prevented.
史に、既設の受信施設に電源部と電源開閉装置とを付加
するだけの簡単な構成であるから、工事費が安い、等の
優れた特長がある。Historically, it has excellent features such as low construction costs because it has a simple configuration that requires only adding a power supply section and a power switchgear to an existing receiving facility.
第１図はテレビ共同受信施設の受信点装置の一例を示す
略示図、第２図は上記装置のブロック図、第３図はテレ
ビ共同受信施設における線路増幅装置の一例を示す略示
図、第４図は異なる構成の電源装置を示す斜視図。
４・・・太陽電池、８・・・蓄電池、９・吻・電源部、
１０・・・電源開閉装置、１１・・・検知用信号入力端
。
特許出願人 マスプロ電工株式会社
代表者 端出 孝
第４図
２９ｆFIG. 1 is a schematic diagram showing an example of a reception point device in a television communal reception facility, FIG. 2 is a block diagram of the above device, and FIG. 3 is a schematic diagram showing an example of a line amplification device in a television communal reception facility. FIG. 4 is a perspective view showing a power supply device with a different configuration. 4... Solar cell, 8... Storage battery, 9. Proboscis/power supply section,
10... Power switchgear, 11... Signal input terminal for detection. Patent applicant Maspro Electric Works Co., Ltd. Representative Takashi Hatade Figure 4 29f
Claims (1)
備えだ電源装置において、上記電源開閉装置は、自体に
備えられた検知用信号入力端に放送波の信号が入力され
る場合には上記電源部からの電源電流を共同受信用機器
に対して供給し、上記検知用信号入力端に放送波の信号
が入力されない場合には上記電源部からの電源電流の上
記供給を断つように構成されていることを特徴とする共
同受信用電源装置。In a power supply device that is equipped with a power supply section consisting of a solar cell and a storage battery, and a power supply switchgear, the power supply switchgear is equipped with the above-mentioned power switchgear when a broadcast wave signal is input to a detection signal input terminal provided therein. The power supply current from the power supply unit is supplied to the communal reception equipment, and when the broadcast wave signal is not input to the detection signal input terminal, the supply of power supply current from the power supply unit is cut off. A power supply device for communal reception characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5563082A JPS58172024A (en) | 1982-04-01 | 1982-04-01 | Power supply device for community reception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5563082A JPS58172024A (en) | 1982-04-01 | 1982-04-01 | Power supply device for community reception |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58172024A true JPS58172024A (en) | 1983-10-08 |
Family
ID=13004098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5563082A Pending JPS58172024A (en) | 1982-04-01 | 1982-04-01 | Power supply device for community reception |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58172024A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61136645U (en) * | 1985-02-13 | 1986-08-25 | ||
| WO1986006238A1 (en) * | 1985-04-16 | 1986-10-23 | Telebeam International Limited | Text receiver |
| FR2619480A1 (en) * | 1987-08-14 | 1989-02-17 | Marinier Denis | Method and device for high-quality transmission, from a wireless sound reproduction facility, with stand-alone sound projectors |
| JP2010239831A (en) * | 2009-03-31 | 2010-10-21 | Maspro Denkoh Corp | Power unit for transmission apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5577241A (en) * | 1978-12-06 | 1980-06-10 | Maspro Denkoh Corp | Community receiving amplifier |
-
1982
- 1982-04-01 JP JP5563082A patent/JPS58172024A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5577241A (en) * | 1978-12-06 | 1980-06-10 | Maspro Denkoh Corp | Community receiving amplifier |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61136645U (en) * | 1985-02-13 | 1986-08-25 | ||
| WO1986006238A1 (en) * | 1985-04-16 | 1986-10-23 | Telebeam International Limited | Text receiver |
| FR2619480A1 (en) * | 1987-08-14 | 1989-02-17 | Marinier Denis | Method and device for high-quality transmission, from a wireless sound reproduction facility, with stand-alone sound projectors |
| JP2010239831A (en) * | 2009-03-31 | 2010-10-21 | Maspro Denkoh Corp | Power unit for transmission apparatus |
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