JPS59132256U - Amplifier switching circuit - Google Patents
Amplifier switching circuitInfo
- Publication number
- JPS59132256U JPS59132256U JP2409483U JP2409483U JPS59132256U JP S59132256 U JPS59132256 U JP S59132256U JP 2409483 U JP2409483 U JP 2409483U JP 2409483 U JP2409483 U JP 2409483U JP S59132256 U JPS59132256 U JP S59132256U
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- zener diode
- zener
- working
- switching circuit
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は一般の有線伝送路の構成を示す概略図、第２図
は従来の増幅器切替回路を示す回路図、第３図は本考案
による増幅器切替回路の実施例を示す回路図である。
４・・・現用増幅器、５・・・補助増幅器、６・・・予
備増幅器、７・・・入力接栓、８・・・出力接栓、１０
．１３・・・ダイオード、３４・・・切替回路、３０．
３２・・・ツェナーダイオード、３１・・・ホトカプラ
、２３゜２５．３５・・・直流電圧源。FIG. 1 is a schematic diagram showing the configuration of a general wired transmission line, FIG. 2 is a circuit diagram showing a conventional amplifier switching circuit, and FIG. 3 is a circuit diagram showing an embodiment of the amplifier switching circuit according to the present invention. 4... Working amplifier, 5... Auxiliary amplifier, 6... Preliminary amplifier, 7... Input connector, 8... Output connector, 10
．． 13... Diode, 34... Switching circuit, 30.
32...Zener diode, 31...Photocoupler, 23°25.35...DC voltage source.
Claims (1)
で必要な電力を供給される現用増幅器と同等の性能を有
する補助増幅器と、この補助増幅器の給電ルートに挿入
され、前記現用増幅器の入出方間直流電圧より大きいツ
ェナー電圧を有する第１のツェナーダイオードと、この
ツェナーダイオードに対し受光部を並列に接続された光
結合素子と、この光結合素子の発光部と直列に接続され
た第２のツェナーダイオードと、前記発光部と前記第２
のツェナーダイオードの直列回路に並列に接続された抵
抗器と、前記補助増幅器前記発光部および前記第１およ
び第２のツェナーダイオ−（の直列回路に並列に接続さ
れた直流電源と、前記現用増幅器の入力端子および出力
端子に接続されている入力接栓および出力接栓と、前記
入力接栓および出力接栓に接続され前記直流電源により
逆バイアスをかけられる第１および第２のダイオードと
を有し、現用増幅器を除去することにより現用増幅
′器側から前記補助増幅器側へ切替わって伝送
信号及び直流定電流が入力されるように構成したことを
特徴とする増幅器切替回路。。An auxiliary amplifier having the same performance as the working amplifier is supplied with the necessary power by a constant DC current superimposed on the transmission signal on the wired transmission path, and the working amplifier is inserted into the power supply route of the auxiliary amplifier and is a first Zener diode having a Zener voltage greater than the DC voltage between the input and output sides, an optical coupling element having a light-receiving section connected in parallel to the Zener diode, and a light-emitting section of the optical coupling element connected in series. a second Zener diode, the light emitting section and the second Zener diode;
a resistor connected in parallel to a series circuit of Zener diodes, a DC power supply connected in parallel to a series circuit of the auxiliary amplifier, the light emitting section, and the first and second Zener diodes, and the working amplifier. and first and second diodes connected to the input and output connectors and reverse-biased by the DC power supply. By removing the working amplifier,
An amplifier switching circuit characterized in that the amplifier switching circuit is configured such that a transmission signal and a constant DC current are input by switching from the amplifier side to the auxiliary amplifier side. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2409483U JPS59132256U (en) | 1983-02-21 | 1983-02-21 | Amplifier switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2409483U JPS59132256U (en) | 1983-02-21 | 1983-02-21 | Amplifier switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59132256U true JPS59132256U (en) | 1984-09-05 |
Family
ID=30155150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2409483U Pending JPS59132256U (en) | 1983-02-21 | 1983-02-21 | Amplifier switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59132256U (en) |
-
1983
- 1983-02-21 JP JP2409483U patent/JPS59132256U/en active Pending
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