JPS58161316U - gain control amplifier - Google Patents
gain control amplifierInfo
- Publication number
- JPS58161316U JPS58161316U JP5822782U JP5822782U JPS58161316U JP S58161316 U JPS58161316 U JP S58161316U JP 5822782 U JP5822782 U JP 5822782U JP 5822782 U JP5822782 U JP 5822782U JP S58161316 U JPS58161316 U JP S58161316U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- emitter
- base
- gain control
- input signal
- 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)
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図は従来の利得制御増幅器の一構成例を示゛す回路
図、第２図はこの考案による利得制御増幅器の第１の実
施例を示す回路図、第３図はこの考案による利得制御増
幅器の第２の実施例を示す回路図である。
１・・・・・・第１のトランジスタペア、１ａ・・・・
・・第１のトランジスタ、１ｂ・・・・・・第２のトラ
ンジスタ、３・・・・・・第２のトランジスタペア、３
ａ・・・・・・第３のトランジスタ、３ｂ・・・・・・
第４のトランジスタ、１０・・・・・・演算回路（演算
増幅器）、１９・・・・・・帰還回路（直流成分帰還回
路）。FIG. 1 is a circuit diagram showing an example of the configuration of a conventional gain control amplifier, FIG. 2 is a circuit diagram showing a first embodiment of a gain control amplifier according to this invention, and FIG. 3 is a circuit diagram showing a first embodiment of a gain control amplifier according to this invention. FIG. 3 is a circuit diagram showing a second embodiment of the amplifier. 1...First transistor pair, 1a...
...First transistor, 1b...Second transistor, 3...Second transistor pair, 3
a...Third transistor, 3b...
Fourth transistor, 10... operational circuit (operational amplifier), 19... feedback circuit (DC component feedback circuit).
Claims (1)
ースに制御電圧が印加される第２のトランジスタのエミ
ッタとを共通接続してなりかつこの共通エミッタに入力
信号が印加される第１のトランジスタペアと、ベースに
前記制御電圧が印加される第３のトランジスタのエミッ
タと第４のトランジスタのエミッタとを共通接続してな
りかつこの共通エミッタに前記入力信号と逆相の入力信
号が印加される第２のトランジスタペアと、前記第１、
第４のトランジスタの各コレクタ電流の差または前記第
２、第３のトランジスタの各コレクタ電流の差を演算し
て出力信号とする演算回路と、前記出力信号中の直流成
分を検出して前記第４のトランジスタのベースに帰還す
る帰還回路とを有してなる利得制御増幅器。A first transistor pair comprising a common connection between the emitter of a first transistor whose base is grounded and the emitter of a second transistor whose base is applied with a control voltage, and whose common emitter is applied with an input signal; , the emitter of a third transistor to which the control voltage is applied to its base and the emitter of a fourth transistor are commonly connected, and an input signal having a phase opposite to that of the input signal is applied to the common emitter. a pair of transistors;
an arithmetic circuit that calculates the difference between the respective collector currents of the fourth transistor or the difference between the respective collector currents of the second and third transistors to generate an output signal; A gain control amplifier comprising a feedback circuit that feeds back to the base of the transistor No. 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5822782U JPS58161316U (en) | 1982-04-21 | 1982-04-21 | gain control amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5822782U JPS58161316U (en) | 1982-04-21 | 1982-04-21 | gain control amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58161316U true JPS58161316U (en) | 1983-10-27 |
Family
ID=30068627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5822782U Pending JPS58161316U (en) | 1982-04-21 | 1982-04-21 | gain control amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58161316U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119512A (en) * | 1980-02-25 | 1981-09-19 | Kensonitsuku Kk | Amplifier |
| JPS5753117A (en) * | 1980-09-17 | 1982-03-30 | Pioneer Electronic Corp | Volume control circuit |
-
1982
- 1982-04-21 JP JP5822782U patent/JPS58161316U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119512A (en) * | 1980-02-25 | 1981-09-19 | Kensonitsuku Kk | Amplifier |
| JPS5753117A (en) * | 1980-09-17 | 1982-03-30 | Pioneer Electronic Corp | Volume control circuit |
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