JPS5768908A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS5768908A
JPS5768908A JP55146147A JP14614780A JPS5768908A JP S5768908 A JPS5768908 A JP S5768908A JP 55146147 A JP55146147 A JP 55146147A JP 14614780 A JP14614780 A JP 14614780A JP S5768908 A JPS5768908 A JP S5768908A
Authority
JP
Japan
Prior art keywords
input signal
voltage
output
signal
converter
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
JP55146147A
Other languages
Japanese (ja)
Inventor
Koichiro Endo
Hidemasa Kitagawa
Katsuyoshi Fujii
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55146147A priority Critical patent/JPS5768908A/en
Publication of JPS5768908A publication Critical patent/JPS5768908A/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 increase the efficiency of amplifiers provided with DC-DC converters, by changing the power supply voltage of an amplifiers according to an input signal. CONSTITUTION:An input signal from an input terminal 9 is rectified and integrated at a rectification and integration circuit 1 to form an envelope signal for the input signal. This signal is compared with the output of a DC-DC converter 4 at a comparator 2, and the output is given to the pulse width modulator 3 being a control voltage. A pulse train with different pulse width is produced according to the control voltage of the modulator 4 to perform on/off control for switching elements of the converter 4. Thus, the output voltage of the converter 4 is increased or decreased in proportion to the envelope signal of the input signal. This voltage is applied as the power supply voltage of an output stage connected to a preamplifier. Since the power supply voltage of the amplifier is changed according to the input signal, the efficiency of the amplifier can be increased.
JP55146147A 1980-10-17 1980-10-17 Amplifier Pending JPS5768908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55146147A JPS5768908A (en) 1980-10-17 1980-10-17 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55146147A JPS5768908A (en) 1980-10-17 1980-10-17 Amplifier

Publications (1)

Publication Number Publication Date
JPS5768908A true JPS5768908A (en) 1982-04-27

Family

ID=15401193

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55146147A Pending JPS5768908A (en) 1980-10-17 1980-10-17 Amplifier

Country Status (1)

Country Link
JP (1) JPS5768908A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795383A (en) * 1987-06-04 1989-01-03 Outboard Marine Corporation Marine propulsion device low-speed exhaust system
WO2004075398A1 (en) * 2003-02-19 2004-09-02 Nujira Ltd. High efficiency amplification
WO2010001806A1 (en) * 2008-06-30 2010-01-07 日本電気株式会社 Power amplification device and power amplification method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795383A (en) * 1987-06-04 1989-01-03 Outboard Marine Corporation Marine propulsion device low-speed exhaust system
WO2004075398A1 (en) * 2003-02-19 2004-09-02 Nujira Ltd. High efficiency amplification
US7482869B2 (en) 2003-02-19 2009-01-27 Nujira Limited High efficiency amplification
KR101126671B1 (en) 2003-02-19 2012-03-30 누지라 리미티드 High efficiency amplification
US8169261B2 (en) 2003-02-19 2012-05-01 Nujira Limited High efficiency amplification
US8749308B2 (en) 2003-02-19 2014-06-10 Nujira Limited High efficiency amplification
US9118278B2 (en) 2003-02-19 2015-08-25 Snaptrack, Inc. High efficiency amplification
US9190958B2 (en) 2003-02-19 2015-11-17 Snaptrack, Inc. High efficiency amplification
US9641132B2 (en) 2003-02-19 2017-05-02 Snaptrack, Inc. High efficiency amplification
WO2010001806A1 (en) * 2008-06-30 2010-01-07 日本電気株式会社 Power amplification device and power amplification method
US8670731B2 (en) 2008-06-30 2014-03-11 Nec Corporation Power amplification apparatus and power amplification method

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