JPS5640307A - Reduced electric power supply system of sound amplifier - Google Patents

Reduced electric power supply system of sound amplifier

Info

Publication number
JPS5640307A
JPS5640307A JP11627579A JP11627579A JPS5640307A JP S5640307 A JPS5640307 A JP S5640307A JP 11627579 A JP11627579 A JP 11627579A JP 11627579 A JP11627579 A JP 11627579A JP S5640307 A JPS5640307 A JP S5640307A
Authority
JP
Japan
Prior art keywords
stage
sound signal
sound
final
output amplifier
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
JP11627579A
Other languages
Japanese (ja)
Inventor
Toshihiko Teshirogi
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.)
Kyocera Corp
Cybernet Electronics Corp
Original Assignee
Kyocera Corp
Cybernet Electronics 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 Kyocera Corp, Cybernet Electronics Corp filed Critical Kyocera Corp
Priority to JP11627579A priority Critical patent/JPS5640307A/en
Publication of JPS5640307A publication Critical patent/JPS5640307A/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 reduce power comsumption and make an acoustic device small-size and light-weight, by feeding DC power for the final-stage output amplifier along the envelope of the instantaneous peak value of a sound signal to be amplified. CONSTITUTION:DC electric power is fed from commercial AC power source AC to final-stage sound output amplifier PAMP through DC-AC converter INV. When sound signal SA is applied from the input terminal to pulse width control circuit CONT through isolator IS, the output pulse width of DC-AC converter INV is changed according to sound signal SA. On the other hand, sound signal SA is applied to sound output amplifier PAMP through delay circuit TD and preceding-stage amplifier AMP. Further, part SC of the output of sound output amplifier PAMP is fed back to the input side of preceding-stage amplifier AMP to prevent final-stage complementary transistors from generating waveform distortion and noise due to fluctuation of respective collector potentials based on power source fluctuation.
JP11627579A 1979-09-10 1979-09-10 Reduced electric power supply system of sound amplifier Pending JPS5640307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11627579A JPS5640307A (en) 1979-09-10 1979-09-10 Reduced electric power supply system of sound amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11627579A JPS5640307A (en) 1979-09-10 1979-09-10 Reduced electric power supply system of sound amplifier

Publications (1)

Publication Number Publication Date
JPS5640307A true JPS5640307A (en) 1981-04-16

Family

ID=14683036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11627579A Pending JPS5640307A (en) 1979-09-10 1979-09-10 Reduced electric power supply system of sound amplifier

Country Status (1)

Country Link
JP (1) JPS5640307A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007228570A (en) * 2006-01-27 2007-09-06 Marvell World Trade Ltd Variable power adaptive transmitter
US9154095B2 (en) 2013-03-15 2015-10-06 Bose Corporation Boost-on-demand amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007228570A (en) * 2006-01-27 2007-09-06 Marvell World Trade Ltd Variable power adaptive transmitter
US9154095B2 (en) 2013-03-15 2015-10-06 Bose Corporation Boost-on-demand amplifier

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