JPH0324711U - - Google Patents
Info
- Publication number
- JPH0324711U JPH0324711U JP8637489U JP8637489U JPH0324711U JP H0324711 U JPH0324711 U JP H0324711U JP 8637489 U JP8637489 U JP 8637489U JP 8637489 U JP8637489 U JP 8637489U JP H0324711 U JPH0324711 U JP H0324711U
- Authority
- JP
- Japan
- Prior art keywords
- input signal
- audio
- standby function
- amplification
- signal switching
- 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
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の一実施例に係る音声増幅用Ｉ
Ｃのミユーテイング装置の回路図、第２図は従来
のミユーテイング装置の回路図である。
Ａ，Ｂ……音声入力信号、１……スタンバイ機
能付き音声増幅用ＩＣ、２……信号入力端子、５
……スタンバイ機能端子、６……入力信号切換回
路、７ａ，７ｂ……制御端子、１０……システム
コントロール用マイコン、１１ａ，１１ｂ……入
力切換制御端子、１２……ミユーテイング制御端
子、１８……スピーカ、２０ａ，２０ｂ……遅延
回路。
Figure 1 shows an I for audio amplification according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of a conventional mutating device. A, B...Audio input signal, 1...Audio amplification IC with standby function, 2...Signal input terminal, 5
...Standby function terminal, 6...Input signal switching circuit, 7a, 7b...Control terminal, 10...System control microcomputer, 11a, 11b...Input switching control terminal, 12...Mumuting control terminal, 18... Speaker, 20a, 20b...Delay circuit.
Claims (1)
切り換える入力信号切換回路と、 前記入力信号切換回路から出力された音声入力
信号を増幅するスタンバイ機能付き音声増幅用Ｉ
Ｃと、 音声入力信号切換指令に基づいて、前記スタン
バイ機能付き音声増幅用ＩＣのスタンバイ機能端
子に対し一定の時間を限つてカツトオフ信号を出
力する手段と、 前記音声入力信号切換指令に基づいて、前記ス
タンバイ機能付き音声増幅用ＩＣの増幅率が所定
のスレツシユレベルまで減少するのに要する所定
時間以上、前記カツトオフ信号出力時点から遅延
して前記入力信号切換回路に音声入力信号の切換
制御信号を出力する手段 とを備えたことを特徴とする音声増幅用ＩＣの
ミユーテイング装置。[Claims for Utility Model Registration] An input signal switching circuit that switches between a plurality of audio input signals having different bias voltages, and an audio amplification I with a standby function that amplifies the audio input signal output from the input signal switching circuit.
C; means for outputting a cut-off signal for a limited period of time to the standby function terminal of the audio amplification IC with standby function based on the audio input signal switching command; and based on the audio input signal switching command, A switching control signal for the audio input signal is supplied to the input signal switching circuit with a delay from the time when the cut-off signal is output for a predetermined time period or more required for the amplification factor of the audio amplification IC with standby function to decrease to a predetermined threshold level. A muting device for an audio amplification IC, characterized in that it is provided with: means for outputting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8637489U JPH0324711U (en) | 1989-07-20 | 1989-07-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8637489U JPH0324711U (en) | 1989-07-20 | 1989-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0324711U true JPH0324711U (en) | 1991-03-14 |
Family
ID=31635901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8637489U Pending JPH0324711U (en) | 1989-07-20 | 1989-07-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0324711U (en) |
-
1989
- 1989-07-20 JP JP8637489U patent/JPH0324711U/ja active Pending
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