JPS5711507A - Power supply circuit for power amplifier - Google Patents

Power supply circuit for power amplifier

Info

Publication number
JPS5711507A
JPS5711507A JP8635380A JP8635380A JPS5711507A JP S5711507 A JPS5711507 A JP S5711507A JP 8635380 A JP8635380 A JP 8635380A JP 8635380 A JP8635380 A JP 8635380A JP S5711507 A JPS5711507 A JP S5711507A
Authority
JP
Japan
Prior art keywords
power
power supply
inputted
amplifier
voltage vout
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
JP8635380A
Other languages
Japanese (ja)
Inventor
Susumu Sueyoshi
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 JP8635380A priority Critical patent/JPS5711507A/en
Publication of JPS5711507A publication Critical patent/JPS5711507A/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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0244—Stepped control

Landscapes

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

Abstract

PURPOSE:To reduce the power loss of an amplifier, by changing the power supply voltage applied to a power amplifying element of a power amlifier of class B or class AB according to the envelope of signal level based on an input signal. CONSTITUTION:An input signal VIN is inputted to a transistor (TR)Q1 of a power amplifier 1, and the output of power TRsQ2,Q3 drive a load Rl such as speaker via emitter resistors R1,R2. The output voltage VOUT of the amplifier 1 is inputted to control signal generating circuits 2a,2b, and when the level difference with power supply voltages Vc,-Vc is a given reference value or less, control signals S1a,S1b are outputted, and when said level difference is the prescribed reference value or less and the level of the voltage VOUT changes rapidly, control signals S2a,S2b are outputted. The signals S1a,S1b are inputted to a power supply circuit 3 and the signals S2a,S2b are inputted to power supply generating circuits 3,4 respectively, and the voltages Vc,-Vc based on the envelope of the voltage VOUT can be applied to the TRsQ2,Q3.
JP8635380A 1980-06-25 1980-06-25 Power supply circuit for power amplifier Pending JPS5711507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8635380A JPS5711507A (en) 1980-06-25 1980-06-25 Power supply circuit for power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8635380A JPS5711507A (en) 1980-06-25 1980-06-25 Power supply circuit for power amplifier

Publications (1)

Publication Number Publication Date
JPS5711507A true JPS5711507A (en) 1982-01-21

Family

ID=13884510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8635380A Pending JPS5711507A (en) 1980-06-25 1980-06-25 Power supply circuit for power amplifier

Country Status (1)

Country Link
JP (1) JPS5711507A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7528662B2 (en) 2005-07-25 2009-05-05 Sony Corporation Signal amplification apparatus and signal amplification method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7528662B2 (en) 2005-07-25 2009-05-05 Sony Corporation Signal amplification apparatus and signal amplification method

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