JPS562713A - Electric power amplifier - Google Patents

Electric power amplifier

Info

Publication number
JPS562713A
JPS562713A JP7785879A JP7785879A JPS562713A JP S562713 A JPS562713 A JP S562713A JP 7785879 A JP7785879 A JP 7785879A JP 7785879 A JP7785879 A JP 7785879A JP S562713 A JPS562713 A JP S562713A
Authority
JP
Japan
Prior art keywords
amplifier
class
power source
floating power
power 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
JP7785879A
Other languages
Japanese (ja)
Inventor
Toshihiko Takagi
Takashi Kuniyoshi
Shigeki Washisawa
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 Columbia Co Ltd
Original Assignee
Nippon Columbia 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 Columbia Co Ltd filed Critical Nippon Columbia Co Ltd
Priority to JP7785879A priority Critical patent/JPS562713A/en
Publication of JPS562713A publication Critical patent/JPS562713A/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 improve efficiency of the power amplifier which consists of the class ''A'' and class ''B'' or class ''AB'' PP amplifier having a floating power source, by inserting the floating power source in series to the output signal path. CONSTITUTION:A class ''A'' PP amplifier is constituted by transistors TR1, 2 and a class ''B'' amplifier is constituted by TR8, 9. Floating power source 6 is inserted in series to the output signal path. That is, respective emitters of TR8, 9 are connected to collectors of TR2, 1. When the circuit is formed in this manner and an input signal is applied, the voltage of the floating power source is added to the maximum output voltage of the power amplifier taken out from load resistor 7. Thus, floating power source 6 can be caused to contribute to enhancement of the maximum output voltage of the amplifier, and consequently, efficiency of the power amplifier can be improved.
JP7785879A 1979-06-20 1979-06-20 Electric power amplifier Pending JPS562713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7785879A JPS562713A (en) 1979-06-20 1979-06-20 Electric power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7785879A JPS562713A (en) 1979-06-20 1979-06-20 Electric power amplifier

Publications (1)

Publication Number Publication Date
JPS562713A true JPS562713A (en) 1981-01-13

Family

ID=13645752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7785879A Pending JPS562713A (en) 1979-06-20 1979-06-20 Electric power amplifier

Country Status (1)

Country Link
JP (1) JPS562713A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476444A (en) * 1981-05-06 1984-10-09 Pioneer Electronic Corporation Power amplifier circuit
US4784420A (en) * 1986-03-12 1988-11-15 Hitachi, Ltd. Orientation control apparatus for suspender
US5018631A (en) * 1988-09-07 1991-05-28 Mannesmann Rexroth Gmbh Hoist device for a load hanging on hoist ropes, in particular a container-crane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476444A (en) * 1981-05-06 1984-10-09 Pioneer Electronic Corporation Power amplifier circuit
US4784420A (en) * 1986-03-12 1988-11-15 Hitachi, Ltd. Orientation control apparatus for suspender
US5018631A (en) * 1988-09-07 1991-05-28 Mannesmann Rexroth Gmbh Hoist device for a load hanging on hoist ropes, in particular a container-crane

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