JPS5715506A - Power supply circuit for class a power amplifier - Google Patents

Power supply circuit for class a power amplifier

Info

Publication number
JPS5715506A
JPS5715506A JP9103280A JP9103280A JPS5715506A JP S5715506 A JPS5715506 A JP S5715506A JP 9103280 A JP9103280 A JP 9103280A JP 9103280 A JP9103280 A JP 9103280A JP S5715506 A JPS5715506 A JP S5715506A
Authority
JP
Japan
Prior art keywords
amplifier
signal
class
voltage
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.)
Granted
Application number
JP9103280A
Other languages
Japanese (ja)
Other versions
JPH0147927B2 (en
Inventor
Masamichi Yumino
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP9103280A priority Critical patent/JPS5715506A/en
Publication of JPS5715506A publication Critical patent/JPS5715506A/en
Publication of JPH0147927B2 publication Critical patent/JPH0147927B2/ja
Granted legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To reduce the collector loss of an output transistor and to increase the efficiency of a power amplifier, by controlling the supply of a power supply voltage according to the signal level of an input signal.
CONSTITUTION: A class A power amplifier 2 consists of output power transistors (TR)Q7, Q9 which are complementary. A voltage source E0 outputting a very lower voltage than the voltage of power supplies +B, -B is connected between power supply electrodes (collector) A, B of the TRs Q7, Q9, and a class B amplifier 5 supplying an output voltage according to the signal level of positive component of an input signal VIN of the amplifier 2 to the electrode A and a class B amplifier 6 supplying the output voltage according to the signal level of a negative component of the signal VIN to the electrode B, are provided. Further, at noninput signal, an idle current is supplied from the voltage source E0, and when the signal level of the positive component of the signal VIN is increased, the amplifier 5 only is operated, the voltage of the electrode A is fluctuated according to this signal level, and the opposite operation is made at the signal input of the negative component.
COPYRIGHT: (C)1982,JPO&Japio
JP9103280A 1980-07-03 1980-07-03 Power supply circuit for class a power amplifier Granted JPS5715506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9103280A JPS5715506A (en) 1980-07-03 1980-07-03 Power supply circuit for class a power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9103280A JPS5715506A (en) 1980-07-03 1980-07-03 Power supply circuit for class a power amplifier

Publications (2)

Publication Number Publication Date
JPS5715506A true JPS5715506A (en) 1982-01-26
JPH0147927B2 JPH0147927B2 (en) 1989-10-17

Family

ID=14015165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9103280A Granted JPS5715506A (en) 1980-07-03 1980-07-03 Power supply circuit for class a power amplifier

Country Status (1)

Country Link
JP (1) JPS5715506A (en)

Also Published As

Publication number Publication date
JPH0147927B2 (en) 1989-10-17

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