JPS5873621U - signal level control circuit - Google Patents
signal level control circuitInfo
- Publication number
- JPS5873621U JPS5873621U JP17005781U JP17005781U JPS5873621U JP S5873621 U JPS5873621 U JP S5873621U JP 17005781 U JP17005781 U JP 17005781U JP 17005781 U JP17005781 U JP 17005781U JP S5873621 U JPS5873621 U JP S5873621U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- rectifier
- voltage doubler
- output
- voltage
- 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
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
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図は従来の信号レベル制御回路の結線図、第２図は
この考案の信号レベル制御回路の結線図である。
１ｂ・・・・・・倍電圧整流部、２ｂ・・・・・・制御
部、Ａｍｐ２・・・・・・第２増幅器、Ｃ１・・・・・
・倍電圧用コンデンサ、Ｃ２・・・・・・平滑用コンデ
ンサ、Ｄｌ・・・・・・整流用ダイオード、Ｄ２・・・
・・・充電路用ダイオード、Ｑｌ・・・・・・第１トラ
ンジスタ。FIG. 1 is a wiring diagram of a conventional signal level control circuit, and FIG. 2 is a wiring diagram of a signal level control circuit of this invention. 1b... Voltage doubler rectifier, 2b... Control unit, Amp2... Second amplifier, C1...
・Voltage doubler capacitor, C2... Smoothing capacitor, Dl... Rectifier diode, D2...
... Charging path diode, Ql... First transistor.
Claims (1)
記増幅器の出力を倍電圧整流する半波型の倍電圧整流部
と、該整流部の出力を平滑する平滑用コンデンサと、該
コンデンサにより平滑された前記整流部の出力がベース
に入力されるトランジスタと、該トランジスタのエミッ
タ電圧により前記増幅器の入力レベルを制御する制御部
とを備えるとともに、前記増幅器の出力端子と前記トラ
ンジスタのベースとの間に、前記整流部の倍電圧用コン
デンサと整流用ダイオードとを直列に設け、前記倍電圧
用コンデンサの充電路用ダイオードのアノードを前記ト
ランジスタのエミッタに接続するとともに、前記充電路
用ダイオードのアノード、カソードを介した電流により
前記倍電圧用コレデンサを充電する信号レベル制御回路
。゛Between the output terminal and the input terminal of the audio signal amplifier, a half-wave type voltage doubler rectifier that voltage doubles the output of the amplifier, a smoothing capacitor that smoothes the output of the rectifier, and the capacitor. a transistor whose base receives the output of the rectifying section smoothed by the input terminal; and a control section which controls the input level of the amplifier based on the emitter voltage of the transistor. A voltage doubler capacitor and a rectifier diode of the rectifier are connected in series between the voltage doubler capacitor and the rectifier diode, and the anode of the charging path diode of the voltage doubler capacitor is connected to the emitter of the transistor. A signal level control circuit that charges the voltage doubler capacitor with a current flowing through an anode and a cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17005781U JPS5873621U (en) | 1981-11-13 | 1981-11-13 | signal level control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17005781U JPS5873621U (en) | 1981-11-13 | 1981-11-13 | signal level control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5873621U true JPS5873621U (en) | 1983-05-18 |
Family
ID=29962023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17005781U Pending JPS5873621U (en) | 1981-11-13 | 1981-11-13 | signal level control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5873621U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316712U (en) * | 1986-07-17 | 1988-02-03 |
-
1981
- 1981-11-13 JP JP17005781U patent/JPS5873621U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316712U (en) * | 1986-07-17 | 1988-02-03 |
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