JPS55166310A - Transient sound preventing circuit - Google Patents

Transient sound preventing circuit

Info

Publication number
JPS55166310A
JPS55166310A JP7585179A JP7585179A JPS55166310A JP S55166310 A JPS55166310 A JP S55166310A JP 7585179 A JP7585179 A JP 7585179A JP 7585179 A JP7585179 A JP 7585179A JP S55166310 A JPS55166310 A JP S55166310A
Authority
JP
Japan
Prior art keywords
amplifier
terminal
power
power source
turned
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
JP7585179A
Other languages
Japanese (ja)
Inventor
Koji Takeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7585179A priority Critical patent/JPS55166310A/en
Publication of JPS55166310A publication Critical patent/JPS55166310A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To prevent the transient sound when the power source is turned off by providing the reverse current preventing diode with the cathode connected to one end of the resistance of the power decoupling capacitor for the first amplifier plus the anode connected to the power terminal each in order to increase the time constant while the power source is turned off. CONSTITUTION:The audio signal sent from the audio equipment or the like through input terminal 1 is amplified through amplifier 2 including the first and the second amplifiers 2a and 2b to be then delivered to output terminal 3. And the output is supplied to load 4. Then power decoupling 7 for the second amplifier is connected between amplifier 2a of amplifier 2 and power terminal 5, and furthermore reverse current preventing diode 9 is connected between power decoupling 7 for the first amplifier of amplifier 2a and terminal 5. Thus the shock sound caused by the ON/ OFF of the power source can be prevented. The cathode side of diode 9 in the transient sound preventing circuit of such constitution is connected to resistance 6b of coupling 6, and the anode side is connected to terminal 5 respectively. In this way, the time constant while the power source is turned off is set longer than that of coupling 6. As a result, the transient sound can be prevented effectively when the power source is turned off.
JP7585179A 1979-06-13 1979-06-13 Transient sound preventing circuit Pending JPS55166310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7585179A JPS55166310A (en) 1979-06-13 1979-06-13 Transient sound preventing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7585179A JPS55166310A (en) 1979-06-13 1979-06-13 Transient sound preventing circuit

Publications (1)

Publication Number Publication Date
JPS55166310A true JPS55166310A (en) 1980-12-25

Family

ID=13588126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7585179A Pending JPS55166310A (en) 1979-06-13 1979-06-13 Transient sound preventing circuit

Country Status (1)

Country Link
JP (1) JPS55166310A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6425216U (en) * 1987-08-05 1989-02-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6425216U (en) * 1987-08-05 1989-02-13

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