JPS60169918U - Muting circuit - Google Patents

Muting circuit

Info

Publication number
JPS60169918U
JPS60169918U JP5700484U JP5700484U JPS60169918U JP S60169918 U JPS60169918 U JP S60169918U JP 5700484 U JP5700484 U JP 5700484U JP 5700484 U JP5700484 U JP 5700484U JP S60169918 U JPS60169918 U JP S60169918U
Authority
JP
Japan
Prior art keywords
relay
muting
control signal
circuit
transistor
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
Application number
JP5700484U
Other languages
Japanese (ja)
Inventor
恵司 中野
樽谷　英司
Original Assignee
富士通テン株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 富士通テン株式会社 filed Critical 富士通テン株式会社
Priority to JP5700484U priority Critical patent/JPS60169918U/en
Publication of JPS60169918U publication Critical patent/JPS60169918U/en
Pending legal-status Critical Current

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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

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来のミュート信号作成回路の一例を示す回路
図、第２図は各部信号波形図、第３図は本考案の一実施
例を示す回路図である。 図中、ＲＬは電源制御リレー、ｔはその切換え接点、Ｔ
、はリレードライバ、Ｔ２はミューティング用のトラン
ジスタ、ＡＭＰはオーディオアンプ、Ｄｌ、Ｄ２はダイ
オードである。FIG. 1 is a circuit diagram showing an example of a conventional mute signal generating circuit, FIG. 2 is a signal waveform diagram of each part, and FIG. 3 is a circuit diagram showing an embodiment of the present invention. In the figure, RL is a power supply control relay, t is its switching contact, and T
, is a relay driver, T2 is a muting transistor, AMP is an audio amplifier, and Dl and D2 are diodes.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] マイクロコンピュータからの電源制御信号を受けて動作
するリレードライバと、該ドライバによって駆動される
電源制御リレーとを備え、該リレーの切換え接点のオン
端子を介して電源装置からオーディオ回路へ電源を供給
するようにしてなる音響機器のミューティング回路にお
いて、該オーディオ回路からスピーカへ至る信号線を開
放もしくは接地する機能を有したミューティング用のト
ランジスタと、前記リレーの切換え接点のオフ端子から
第１のミュート制御信号を取り出す第１のダイオードと
、前記リレードライバの出力端子から第２のミュート制
御信号を取り出す第２のダイオードとを備え、該第１お
よび第２のダイオードのオア出力で前記ミューティング
用のトランジスタを制御するようにしてなることを特徴
とするミューティング回路。It includes a relay driver that operates in response to a power control signal from a microcomputer, and a power control relay driven by the driver, and supplies power from the power supply to the audio circuit through the ON terminal of the switching contact of the relay. A muting circuit for an audio device comprising: a muting transistor having a function of opening or grounding a signal line from the audio circuit to a speaker; and a first muting transistor from an off terminal of a switching contact of the relay. a first diode for taking out a control signal; and a second diode for taking out a second mute control signal from the output terminal of the relay driver; A muting circuit characterized by controlling a transistor.
JP5700484U 1984-04-18 1984-04-18 Muting circuit Pending JPS60169918U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5700484U JPS60169918U (en) 1984-04-18 1984-04-18 Muting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5700484U JPS60169918U (en) 1984-04-18 1984-04-18 Muting circuit

Publications (1)

Publication Number Publication Date
JPS60169918U true JPS60169918U (en) 1985-11-11

Family

ID=30581134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5700484U Pending JPS60169918U (en) 1984-04-18 1984-04-18 Muting circuit

Country Status (1)

Country Link
JP (1) JPS60169918U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5748715B2 (en) * 1976-10-25 1982-10-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5748715B2 (en) * 1976-10-25 1982-10-18

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