JPS5917689U - speaker protection circuit - Google Patents

speaker protection circuit

Info

Publication number
JPS5917689U
JPS5917689U JP7540083U JP7540083U JPS5917689U JP S5917689 U JPS5917689 U JP S5917689U JP 7540083 U JP7540083 U JP 7540083U JP 7540083 U JP7540083 U JP 7540083U JP S5917689 U JPS5917689 U JP S5917689U
Authority
JP
Japan
Prior art keywords
midpoint
break
relay
drift
multivib
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.)
Granted
Application number
JP7540083U
Other languages
Japanese (ja)
Other versions
JPS5921598Y2 (en
Inventor
栄次 山崎
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Priority to JP7540083U priority Critical patent/JPS5921598Y2/en
Publication of JPS5917689U publication Critical patent/JPS5917689U/en
Application granted granted Critical
Publication of JPS5921598Y2 publication Critical patent/JPS5921598Y2/en
Expired legal-status Critical Current

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) [Abstract] 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図は本考案回路のブロック図、第２図はその具体的
回路図である。FIG. 1 is a block diagram of the circuit of the present invention, and FIG. 2 is a specific circuit diagram thereof.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] マルチバイブレータと、該マルチバイブレークに駆動さ
せられる発光ダイオードと、電源がＯＮして上記マルチ
バイブレークに電源電圧が印加されている間ＯＮするこ
とにより上記マルチバイブレークを発振させて上記発光
ダイオードを点滅させると共にＯＦＦすることにより上
記マルチバイブレークの発振を止めて上記発光ダイオー
ドの点灯を持続させるスイッチングトランジスタと、ス
ピーカ用アンプの中点ドリフトを検出する中点ドリフト
検出回路と、リレーを動作させることによりスピーカ用
アンプとスピーカとの間のリレ一端一　子をＯＮ、６Ｆ
Ｆさせるものであって上記電源０８時より所定時間の間
第１の状態を取って上記スイッチングトランジスタをＯ
Ｎさせる出力を出しその所定時間経過後に第２の状態を
取って上記リレーを動作させリレ一端子をＯＮさせるシ
ュミットトリガ回路とより成り、該シュミットトリガ回
路は上記第２の状態時に上記中点ドリフト検出回路が上
記中点ドリフトを検出するとこれに相俟って上記第１の
状態に切り換り、上記リレーを動作させてリレ一端子を
ＯＦＦすると共に上記スイッチングトランジスタに出力
するものであるスピーカ保護回路。A multivibrator, a light emitting diode driven by the multivib break, and the multivib break is turned on while a power supply voltage is applied to the multivib break to cause the multivib break to oscillate and blink the light emitting diode. A switching transistor that stops the oscillation of the multi-by-break and keeps the light emitting diode lit by turning it off, a midpoint drift detection circuit that detects the midpoint drift of the speaker amplifier, and a midpoint drift detection circuit that detects the midpoint drift of the speaker amplifier by operating a relay. Turn on one end of the relay between the and the speaker, 6F
The switching transistor is turned on by taking the first state for a predetermined period of time from 08:00 on the power supply.
A Schmitt trigger circuit outputs an output to make the switch N, and after a predetermined time elapses, assumes a second state, operates the relay, and turns on the relay terminal. When the detection circuit detects the midpoint drift, it simultaneously switches to the first state, operates the relay, turns off the relay terminal, and outputs the output to the switching transistor. circuit.
JP7540083U 1983-05-19 1983-05-19 speaker protection circuit Expired JPS5921598Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7540083U JPS5921598Y2 (en) 1983-05-19 1983-05-19 speaker protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7540083U JPS5921598Y2 (en) 1983-05-19 1983-05-19 speaker protection circuit

Publications (2)

Publication Number Publication Date
JPS5917689U true JPS5917689U (en) 1984-02-02
JPS5921598Y2 JPS5921598Y2 (en) 1984-06-26

Family

ID=30205466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7540083U Expired JPS5921598Y2 (en) 1983-05-19 1983-05-19 speaker protection circuit

Country Status (1)

Country Link
JP (1) JPS5921598Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61169325A (en) * 1985-01-21 1986-07-31 Mitsubishi Agricult Mach Co Ltd Front wheel driver for tractor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61169325A (en) * 1985-01-21 1986-07-31 Mitsubishi Agricult Mach Co Ltd Front wheel driver for tractor
JPH0558930B2 (en) * 1985-01-21 1993-08-27 Mitsubishi Agricult Mach

Also Published As

Publication number Publication date
JPS5921598Y2 (en) 1984-06-26

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