JPS6286717U - - Google Patents
Info
- Publication number
- JPS6286717U JPS6286717U JP17855285U JP17855285U JPS6286717U JP S6286717 U JPS6286717 U JP S6286717U JP 17855285 U JP17855285 U JP 17855285U JP 17855285 U JP17855285 U JP 17855285U JP S6286717 U JPS6286717 U JP S6286717U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switch
- time constant
- power supply
- power
- 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
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000005236 sound signal Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案になるミユーテイング回路の一
実施例の回路図、第２図は第１図に示したミユー
テイング回路の動作を説明するための図、第３図
は第１図中に示した安定化電源回路９の入出力電
圧特性を示す図、第４図は従来のミユーテイング
回路の一例を示す図、第５図は第４図に示したミ
ユーテイング回路の動作を説明するための図、第
６図は従来のミユーテイング回路の他の例を示す
図、第７図は第６図に示したミユーテイング回路
の動作を説明するための図である。
１……電源回路、２……ミユーテイングコント
ロール回路、３……増幅回路、４……端子、５…
…リレー、６……出力端子、７……入力端子、８
……電流源、９……安定化電源回路、Ｔ１〜Ｔ５
……トランジスタ、Ｄ１，Ｄ２……ダイオード、
Ｒ１〜Ｒ４……抵抗器、Ｃ……コンデンサ。
Fig. 1 is a circuit diagram of one embodiment of the mutating circuit of the present invention, Fig. 2 is a diagram for explaining the operation of the muting circuit shown in Fig. 1, and Fig. 3 is the same as that shown in Fig. 1. 4 is a diagram showing an example of a conventional muting circuit; FIG. 5 is a diagram for explaining the operation of the muting circuit shown in FIG. 4; FIG. 6 is a diagram showing another example of the conventional muting circuit, and FIG. 7 is a diagram for explaining the operation of the muting circuit shown in FIG. DESCRIPTION OF SYMBOLS 1... Power supply circuit, 2... Muting control circuit, 3... Amplification circuit, 4... Terminal, 5...
...Relay, 6...Output terminal, 7...Input terminal, 8
...Current source, 9...Stabilized power supply circuit, T1 to T5
...transistor, D 1 , D 2 ... diode,
R1 to R4 ...Resistor, C...Capacitor.
Claims (1)
に電源電圧を供給する電源回路と、 前記電源投入時及び電源遮断時にミユーテイン
グ信号を出力するミユーテイングコントロール回
路と、 このミユーテイング信号に対応して前記増幅回
路の出力信号をミユートする第１のスイツチと、 前記電源回路の出力端子に接続され、前記電源
回路の放電時定数より長い時定数を有し、前記第
１のスイツチを駆動可能な容量素子を備えた時定
数回路と、 前記時定数回路と前記第１のスイツチとの間に
介挿され、前記電源遮断時以降、前記電源回路の
出力電圧が所定値まで低下したことを検出して導
通状態となり、前記時定数回路を前記第１のスイ
ツチに接続する第２のスイツチとからなり、 前記電源遮断時以降、前記電源回路の放電時定
数で設定される期間より長い期間にわたつて前記
第１のスイツチを継続して駆動することを特徴と
するミユーテイング回路。[Scope of Claim for Utility Model Registration] An amplifier circuit that amplifies an audio signal; a power supply circuit that supplies a power supply voltage to the amplifier circuit after a predetermined time has elapsed since power is turned on; and a muting signal that outputs a muting signal when the power is turned on and when the power is turned off. a first switch that mutes the output signal of the amplifier circuit in response to the muting signal; and a first switch that is connected to the output terminal of the power supply circuit and has a time constant longer than a discharge time constant of the power supply circuit. a time constant circuit having a capacitive element capable of driving the first switch; and a time constant circuit interposed between the time constant circuit and the first switch, the time constant circuit being inserted between the time constant circuit and the first switch, and configured to operate the power supply circuit after the power is cut off. a second switch that detects that the output voltage of the switch has decreased to a predetermined value and becomes conductive, and connects the time constant circuit to the first switch; A muting circuit characterized in that the first switch is continuously driven for a period longer than a period set by a time constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17855285U JPS6286717U (en) | 1985-11-20 | 1985-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17855285U JPS6286717U (en) | 1985-11-20 | 1985-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6286717U true JPS6286717U (en) | 1987-06-03 |
Family
ID=31120789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17855285U Pending JPS6286717U (en) | 1985-11-20 | 1985-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6286717U (en) |
-
1985
- 1985-11-20 JP JP17855285U patent/JPS6286717U/ja active Pending
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