JPS55127709A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS55127709A
JPS55127709A JP3484579A JP3484579A JPS55127709A JP S55127709 A JPS55127709 A JP S55127709A JP 3484579 A JP3484579 A JP 3484579A JP 3484579 A JP3484579 A JP 3484579A JP S55127709 A JPS55127709 A JP S55127709A
Authority
JP
Japan
Prior art keywords
signal
differential amplifier
input signal
diode
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.)
Granted
Application number
JP3484579A
Other languages
Japanese (ja)
Other versions
JPS6125244B2 (en
Inventor
Ryuichi Fukuda
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 JP3484579A priority Critical patent/JPS55127709A/en
Publication of JPS55127709A publication Critical patent/JPS55127709A/en
Publication of JPS6125244B2 publication Critical patent/JPS6125244B2/ja
Granted 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
    • H03F1/0261—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 polarisation voltage or current, e.g. gliding Class A

Abstract

PURPOSE:To obtain a power amplifier where the distortion rate and efficiency are improved, by making it possible to set the bias of the amplifier according to fluctuation of a signal level independently of the signal frequency. CONSTITUTION:The input signal from terminal 1 is applied to transistors TR9, 10, which constitute a complementary push-pull circuit, through resistances 7 and 8 and is amplified, and after that, this amplified signal not only is applied to load 17 but also sets the base bias of TR9, 10 through full-wave rectifying circuit 2, peak detector 4 having a negative feedback circuit dependent upon resistance 15 and diode 14, and differential amplifier 6. Then, the output signal from emitter resistances 11 and 12 of TR9, 10 is fed back to differential amplifier 6 through differential amplifier 13. The output of peak detector 4 follows the input signal level rapidly due to reduction of the discharging time constant dependent upon the negative feedback circuit of resistance 15 and diode 14 when the input signal is reduced.
JP3484579A 1979-03-24 1979-03-24 Power amplifier Granted JPS55127709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3484579A JPS55127709A (en) 1979-03-24 1979-03-24 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3484579A JPS55127709A (en) 1979-03-24 1979-03-24 Power amplifier

Publications (2)

Publication Number Publication Date
JPS55127709A true JPS55127709A (en) 1980-10-02
JPS6125244B2 JPS6125244B2 (en) 1986-06-14

Family

ID=12425518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3484579A Granted JPS55127709A (en) 1979-03-24 1979-03-24 Power amplifier

Country Status (1)

Country Link
JP (1) JPS55127709A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5790901U (en) * 1980-11-22 1982-06-04
US4476441A (en) * 1980-12-23 1984-10-09 Zdzislaw Gulczynski Push-pull power amplifier
US6133792A (en) * 1998-09-17 2000-10-17 Telefonakteibolaget Lm Ericsson Method and apparatus for preventing power amplifier saturation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126673U (en) * 1984-07-24 1986-02-17 カルソニックカンセイ株式会社 Soft cover for console box

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5790901U (en) * 1980-11-22 1982-06-04
US4476441A (en) * 1980-12-23 1984-10-09 Zdzislaw Gulczynski Push-pull power amplifier
US6133792A (en) * 1998-09-17 2000-10-17 Telefonakteibolaget Lm Ericsson Method and apparatus for preventing power amplifier saturation

Also Published As

Publication number Publication date
JPS6125244B2 (en) 1986-06-14

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