JPS5656015A - Electric power amplifier - Google Patents

Electric power amplifier

Info

Publication number
JPS5656015A
JPS5656015A JP13155079A JP13155079A JPS5656015A JP S5656015 A JPS5656015 A JP S5656015A JP 13155079 A JP13155079 A JP 13155079A JP 13155079 A JP13155079 A JP 13155079A JP S5656015 A JPS5656015 A JP S5656015A
Authority
JP
Japan
Prior art keywords
transistors
distortion
comparing
power amplifier
output
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
JP13155079A
Other languages
Japanese (ja)
Inventor
Yutaka Nishimoto
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 JP13155079A priority Critical patent/JPS5656015A/en
Publication of JPS5656015A publication Critical patent/JPS5656015A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3071—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with asymmetrical driving of the end stage

Abstract

PURPOSE:To reduce crossover distortion and switching distortion by comparing a voltage at the output terminal of a variable bias system power amplifier to a reference potential between both input terminals of the 1st and 2nd amplification parts. CONSTITUTION:A reference potential developed at connection point P is compared to a potential at output terminal 22 by comparing method 19 and on the basis of its comparison result, E-C voltages of transistors 17 and 18 are controlled to prevent output transistors 15 and 16 from being cut off completely. Since transistors 15 and 16 are never cut off completely, crossover distortion and switching distortion can be prevented from appearing. In addition, since input terminals 19a and 19b of comparing method 19 are connected to balance points of bridge circuit 30 respectively, even fluctuations of idling currents of transistors 15 and 16 exert no influence upon the output of comparing method 19, and consequently the circuit extremely stable against fluctuations of temperature can be realized.
JP13155079A 1979-10-12 1979-10-12 Electric power amplifier Pending JPS5656015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13155079A JPS5656015A (en) 1979-10-12 1979-10-12 Electric power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13155079A JPS5656015A (en) 1979-10-12 1979-10-12 Electric power amplifier

Publications (1)

Publication Number Publication Date
JPS5656015A true JPS5656015A (en) 1981-05-16

Family

ID=15060691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13155079A Pending JPS5656015A (en) 1979-10-12 1979-10-12 Electric power amplifier

Country Status (1)

Country Link
JP (1) JPS5656015A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188208A (en) * 1983-04-08 1984-10-25 Onkyo Corp Power amplifier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5541025A (en) * 1978-09-14 1980-03-22 Nagasawa:Kk Bias current automatic adjusting method and push pull amplifier circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5541025A (en) * 1978-09-14 1980-03-22 Nagasawa:Kk Bias current automatic adjusting method and push pull amplifier circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188208A (en) * 1983-04-08 1984-10-25 Onkyo Corp Power amplifier

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