JPS5859220U - gain control circuit - Google Patents
gain control circuitInfo
- Publication number
- JPS5859220U JPS5859220U JP15440681U JP15440681U JPS5859220U JP S5859220 U JPS5859220 U JP S5859220U JP 15440681 U JP15440681 U JP 15440681U JP 15440681 U JP15440681 U JP 15440681U JP S5859220 U JPS5859220 U JP S5859220U
- Authority
- JP
- Japan
- Prior art keywords
- analog switch
- control circuit
- gain control
- input
- amplifier
- 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図は従来の利得制御回路の構成を示す回路図、第２
図は本考案の第１実施例の構成を示す回路図、第３図は
本考案の第１実施例において、Ｄｋとしてバイナリ信号
を使用した場合の利得を示すグラフ、第４図は本考案の
第２実施例の構成を示す回路図である。
１．２，７，８．９・・・・・・ＯＰアンプ、３・・・
・・・制御信号発生回路、４・・・・・・アップ・ダウ
ンスイッチ、５・・・・・・パワーアンプ、６・・・・
・・スピーカ、Ａ１゜Ａ２． Ａ３・・・・・・反転増
幅器、Ｓｌ・・・・・・第１のアナログスイッチ、Ｓ２
・・・・・・第２のアナログスイッチ、ｒ１〜ｒ６・・
・・・・直列抵抗群、ｒｌ ２． ｒ２３． ｒ３４゜
、 ｒ４５．ｒ５５・・・・・・入力抵抗群、Ｄｏ〜
Ｄ４・・・・・・デジタル信号、Ｖｉ・・・・・・入力
信号、Ｖｏ・・・・・・出力信号。Figure 1 is a circuit diagram showing the configuration of a conventional gain control circuit;
The figure is a circuit diagram showing the configuration of the first embodiment of the present invention, Figure 3 is a graph showing the gain when a binary signal is used as Dk in the first embodiment of the present invention, and Figure 4 is a graph of the gain of the first embodiment of the present invention. FIG. 2 is a circuit diagram showing the configuration of a second embodiment. 1.2,7,8.9...OP amplifier, 3...
... Control signal generation circuit, 4 ... Up/down switch, 5 ... Power amplifier, 6 ...
...Speaker, A1゜A2. A3... Inverting amplifier, Sl... First analog switch, S2
...Second analog switch, r1 to r6...
...Series resistance group, rl 2. r23. r34°, r45. r55...Input resistance group, Do~
D4...Digital signal, Vi...Input signal, Vo...Output signal.
Claims (1)
列抵抗群の各接続点に接続され、かつ他端を２系統に分
岐され１．一方は第１のアナログスイッチを介して前記
反転増幅器の反転入力に接続され、他方は第２のアナロ
グスイッチを介してアースまたは仮想アースされた入力
抵抗群と、前記第１のアナログスイッチと第２のアナロ
グスイッチとを相補的にオン、オフさせるスイッチング
制御手段とからなることを特徴とする利得制御回路。[Claims for Utility Model Registration] Provided on the input side of an inverting amplifier using an OP amplifier; a series resistor group that divides the input signal into multiple stages; and one end connected to each connection point of the series resistor group, and the other end was branched into two systems: 1. a group of input resistors, one of which is connected to the inverting input of the inverting amplifier via a first analog switch, and the other to ground or virtual ground via a second analog switch; What is claimed is: 1. A gain control circuit comprising: an analog switch; and switching control means for turning on and off the analog switch in a complementary manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15440681U JPS5859220U (en) | 1981-10-17 | 1981-10-17 | gain control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15440681U JPS5859220U (en) | 1981-10-17 | 1981-10-17 | gain control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5859220U true JPS5859220U (en) | 1983-04-21 |
Family
ID=29947005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15440681U Pending JPS5859220U (en) | 1981-10-17 | 1981-10-17 | gain control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5859220U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60206209A (en) * | 1984-03-29 | 1985-10-17 | Teac Co | Sound volume controller |
| JPH0321110A (en) * | 1989-06-19 | 1991-01-29 | Hitachi Ltd | Gain control circuit |
-
1981
- 1981-10-17 JP JP15440681U patent/JPS5859220U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60206209A (en) * | 1984-03-29 | 1985-10-17 | Teac Co | Sound volume controller |
| JPH0321110A (en) * | 1989-06-19 | 1991-01-29 | Hitachi Ltd | Gain control circuit |
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