JPH0485913U - - Google Patents
Info
- Publication number
- JPH0485913U JPH0485913U JP12846490U JP12846490U JPH0485913U JP H0485913 U JPH0485913 U JP H0485913U JP 12846490 U JP12846490 U JP 12846490U JP 12846490 U JP12846490 U JP 12846490U JP H0485913 U JPH0485913 U JP H0485913U
- Authority
- JP
- Japan
- Prior art keywords
- control signal
- vca
- circuit
- vca control
- audio
- 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)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図はＶＣＡの特性図、第３図は従来の音声信
号遮断装置を示すブロツク図である。
４……ＶＣＡ、６……ミユート回路、９……マ
イクロコンピユータ、１１……ＶＣＡ制御信号遮
断回路、Ｔｒ１……ミユートトランジスタ、Ｔｒ
２……ＶＣＡ制御信号遮断トランジスタ。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a characteristic diagram of a VCA, and FIG. 3 is a block diagram showing a conventional audio signal cutoff device. 4...VCA, 6...Miute circuit, 9...Microcomputer, 11...VCA control signal cutoff circuit, Tr 1 ...Miute transistor, Tr
2 ...VCA control signal cutoff transistor.
Claims (1)
中に、ＶＣＡ制御信号の電圧レベルと利得とが正
の相関関係を持つＶＣＡとミユート回路とを直列
に接続した音声信号遮断装置において、上記ＶＣ
Ａに至るＶＣＡ制御信号の供給経路に、オンされ
ることによつてＶＣＡ制御信号をアースと短絡さ
せるＶＣＡ制御信号遮断回路を設け、ミユート信
号を前記ミユート回路と上記ＶＣＡ制御信号遮断
回路とに供給して上記両回路をオンさせるように
構成したことを特徴とする音声信号遮断装置。 In the audio signal cutoff device in which a VCA and a mute circuit are connected in series in a signal path from the output of the audio device to the speaker, the voltage level and gain of the VCA control signal have a positive correlation, the VC
A VCA control signal cutoff circuit that short-circuits the VCA control signal to ground when turned on is provided in the VCA control signal supply path leading to A, and a mute signal is supplied to the mute circuit and the VCA control signal cutoff circuit. An audio signal cutoff device characterized in that the audio signal cutoff device is configured to turn on both of the above circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12846490U JPH0485913U (en) | 1990-11-30 | 1990-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12846490U JPH0485913U (en) | 1990-11-30 | 1990-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0485913U true JPH0485913U (en) | 1992-07-27 |
Family
ID=31875924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12846490U Pending JPH0485913U (en) | 1990-11-30 | 1990-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0485913U (en) |
-
1990
- 1990-11-30 JP JP12846490U patent/JPH0485913U/ja active Pending