JPS56162511A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS56162511A
JPS56162511A JP6696480A JP6696480A JPS56162511A JP S56162511 A JPS56162511 A JP S56162511A JP 6696480 A JP6696480 A JP 6696480A JP 6696480 A JP6696480 A JP 6696480A JP S56162511 A JPS56162511 A JP S56162511A
Authority
JP
Japan
Prior art keywords
right channel
channel signals
voltage
output
amplitude
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
JP6696480A
Other languages
Japanese (ja)
Inventor
Shuichi Kato
Hiromi Kusakabe
Hiroyasu Yamaguchi
Yoshihiro Yoshida
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6696480A priority Critical patent/JPS56162511A/en
Publication of JPS56162511A publication Critical patent/JPS56162511A/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
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters

Landscapes

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

Abstract

PURPOSE:To simplify constitution by using an amplitude-modulation type power source for the power amplification of stereophonic acoustic signals and by varying the power voltage of an output stage following up either one of left and right channel signals whose absolute value level is greater. CONSTITUTION:Left and right channel signals of a two-channel stereophonic acoustic signal are inputted to terminals 21 and 22, and an absolute-value detecting circuit 23 outputs a control signal which corresponds to a level greater in absolute value between the left and right channel signals. According to the amplitude of said control signal, a switching power source 24 modulates a commercial power voltage and applies the resulting voltage to a transmission transformer T3. The output of the transformer T3 is demodulated by diode Ds 5 and 6 and capacitor Cs 5 and 6 and the demodulated voltage is applied as an output-stage power voltage to amplifying circuits 25 and 26. The said left and right channel signals are inputted via terminals 27 and 28 to the amplifying circuits 25 and 26 to be amplified and their outputs are supplied to speakers 29 and 30.
JP6696480A 1980-05-20 1980-05-20 Power amplifier Pending JPS56162511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6696480A JPS56162511A (en) 1980-05-20 1980-05-20 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6696480A JPS56162511A (en) 1980-05-20 1980-05-20 Power amplifier

Publications (1)

Publication Number Publication Date
JPS56162511A true JPS56162511A (en) 1981-12-14

Family

ID=13331206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6696480A Pending JPS56162511A (en) 1980-05-20 1980-05-20 Power amplifier

Country Status (1)

Country Link
JP (1) JPS56162511A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0623400U (en) * 1992-08-20 1994-03-25 オンキヨー株式会社 Audio player
JP2009135903A (en) * 2007-10-16 2009-06-18 Thx Ltd Efficient power amplifier
JP2010124062A (en) * 2008-11-17 2010-06-03 Asahi Kasei Electronics Co Ltd Load drive circuit with power source
JP2013214867A (en) * 2012-04-02 2013-10-17 Sharp Corp Device for reducing power consumption, wireless device, and method for reducing power consumption

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119149A (en) * 1976-03-31 1977-10-06 Sansui Electric Co Amplifying device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119149A (en) * 1976-03-31 1977-10-06 Sansui Electric Co Amplifying device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0623400U (en) * 1992-08-20 1994-03-25 オンキヨー株式会社 Audio player
JP2009135903A (en) * 2007-10-16 2009-06-18 Thx Ltd Efficient power amplifier
JP2010124062A (en) * 2008-11-17 2010-06-03 Asahi Kasei Electronics Co Ltd Load drive circuit with power source
JP2013214867A (en) * 2012-04-02 2013-10-17 Sharp Corp Device for reducing power consumption, wireless device, and method for reducing power consumption

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