JPS56122513A - Electric power supply system - Google Patents

Electric power supply system

Info

Publication number
JPS56122513A
JPS56122513A JP2717080A JP2717080A JPS56122513A JP S56122513 A JPS56122513 A JP S56122513A JP 2717080 A JP2717080 A JP 2717080A JP 2717080 A JP2717080 A JP 2717080A JP S56122513 A JPS56122513 A JP S56122513A
Authority
JP
Japan
Prior art keywords
electric power
circuit
power supply
amplifier
load
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
JP2717080A
Other languages
Japanese (ja)
Inventor
Terufumi Hino
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP2717080A priority Critical patent/JPS56122513A/en
Publication of JPS56122513A publication Critical patent/JPS56122513A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the electric power consumption and improve the electric power supply efficiency, by varying the supply voltage in accordance with an input signal level in the high output amplifier, and also supplying the proper supply voltage to the amplifier in accordance with the load connected to the output side of the amplifier.
CONSTITUTION: Since the relay switch 4 is connected to the terminal (b) side immediately after the electric power supply has been turned on, the impedance value of the load 3 is detected by the load detection circuit 6, and a control signal according to its impedance level is provided to the voltage control circuit 12. On the other hand, as for the input signal which has been provided to the input terminal 1, its signal level is detected by the input level detection circuit 11, and a control signal according to the signal level is provided to the circuit 12. The circuit 12 controls the output voltage of the electric power supply circuit 13 in accordane with the control signal which is obtained from the circuits 6, 11, and a result, the supply voltage according to the load impedance value and the input signal level is derived, and it is supplied to the amplifier 2.
COPYRIGHT: (C)1981,JPO&Japio
JP2717080A 1980-03-03 1980-03-03 Electric power supply system Pending JPS56122513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2717080A JPS56122513A (en) 1980-03-03 1980-03-03 Electric power supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2717080A JPS56122513A (en) 1980-03-03 1980-03-03 Electric power supply system

Publications (1)

Publication Number Publication Date
JPS56122513A true JPS56122513A (en) 1981-09-26

Family

ID=12213579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2717080A Pending JPS56122513A (en) 1980-03-03 1980-03-03 Electric power supply system

Country Status (1)

Country Link
JP (1) JPS56122513A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5981114U (en) * 1982-11-24 1984-06-01 日本コロムビア株式会社 Power amplifier bias control device
JPS6139706A (en) * 1984-07-31 1986-02-25 Matsushita Electric Ind Co Ltd Output limit device of power amplifier
DE19712571C1 (en) * 1997-03-25 1998-06-10 Becker Gmbh Automobile amplifier with overload protection

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5981114U (en) * 1982-11-24 1984-06-01 日本コロムビア株式会社 Power amplifier bias control device
JPS6139706A (en) * 1984-07-31 1986-02-25 Matsushita Electric Ind Co Ltd Output limit device of power amplifier
DE19712571C1 (en) * 1997-03-25 1998-06-10 Becker Gmbh Automobile amplifier with overload protection

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