JPS5447557A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS5447557A
JPS5447557A JP11438877A JP11438877A JPS5447557A JP S5447557 A JPS5447557 A JP S5447557A JP 11438877 A JP11438877 A JP 11438877A JP 11438877 A JP11438877 A JP 11438877A JP S5447557 A JPS5447557 A JP S5447557A
Authority
JP
Japan
Prior art keywords
voltage
amplifier
power
a2ei
a1ei
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
JP11438877A
Other languages
Japanese (ja)
Inventor
Kenji Yokoyama
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP11438877A priority Critical patent/JPS5447557A/en
Publication of JPS5447557A publication Critical patent/JPS5447557A/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

Landscapes

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

Abstract

PURPOSE:To obtain an A-class amplifier featuring a low power loss in the transistor as well as the reduced distortion, by setting the power voltage to be supplied to the power amplifying transistor to such level that is obtained by applying the constant voltage to the voltage which is proportional to the input signal. CONSTITUTION:The input signal voltage is referred to as ei, the gain of amplifier 2 is A1, the gain of power supply amplifier 8 is A2, and the generation voltage of power supply 9 and 10 are E1 and E2 respectively. Thus, the signal voltage of output terminal 6 becomes nearly to A1ei, and the voltage amplified through amplifier 8 is A2ei. If E1=E2=E and A1=A2 are satisfied, collector emitter voltage VCE1=VCE2=A2ei+E1-A1ei=E is obtained. Therefore, generation voltage E of supply 9 and 10 suffices with the minimum collector-emitter voltage necessary for operation of Tr4 and 5. And a constant minimum necessary amount is secured regardless of the input signals, and thus the power loss can be minimized even for a A-class amplifier.
JP11438877A 1977-09-22 1977-09-22 Power amplifier Pending JPS5447557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11438877A JPS5447557A (en) 1977-09-22 1977-09-22 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11438877A JPS5447557A (en) 1977-09-22 1977-09-22 Power amplifier

Publications (1)

Publication Number Publication Date
JPS5447557A true JPS5447557A (en) 1979-04-14

Family

ID=14636415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11438877A Pending JPS5447557A (en) 1977-09-22 1977-09-22 Power amplifier

Country Status (1)

Country Link
JP (1) JPS5447557A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56118194U (en) * 1980-02-12 1981-09-09
JPS57208710A (en) * 1981-06-17 1982-12-21 Pioneer Electronic Corp Power amplifier
JPS58150303A (en) * 1982-03-03 1983-09-07 Hitachi Ltd Power amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56118194U (en) * 1980-02-12 1981-09-09
JPS57208710A (en) * 1981-06-17 1982-12-21 Pioneer Electronic Corp Power amplifier
JPS58150303A (en) * 1982-03-03 1983-09-07 Hitachi Ltd Power amplifier

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