JPS55137706A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS55137706A
JPS55137706A JP4624079A JP4624079A JPS55137706A JP S55137706 A JPS55137706 A JP S55137706A JP 4624079 A JP4624079 A JP 4624079A JP 4624079 A JP4624079 A JP 4624079A JP S55137706 A JPS55137706 A JP S55137706A
Authority
JP
Japan
Prior art keywords
amplifier
input
level
input signal
signal level
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
JP4624079A
Other languages
Japanese (ja)
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 JP4624079A priority Critical patent/JPS55137706A/en
Publication of JPS55137706A publication Critical patent/JPS55137706A/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
    • H03F1/0261—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

Landscapes

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

Abstract

PURPOSE:To improve effectively efficiency while keeping the calss A operation, by changing the bias according to the signal level independently of the frequency. CONSTITUTION:One input signal is supplied to a load through the push-pull amplifier circuit of transistors Tr9, 10, and the other is subjected to full-wave rectification in 2, and the output has the peak held by buffer amplifier 4 and capacitor 16. In case of a large instantaneous value of the input signal, diodes D17 and Tr18 are biased reversely to become a cutoff state, and Tr22 is cut off also, and the DC signal level at output terminal 5 of amplifier 4 is not discharged but is held in a level corresponding to the maximum value. When the input signal level becomes a prescribed value or less, D17 and Tr17, 33 are conductive, and the DC potential of terminal 5 is discharged with a high time constant, and this signal gives a bias voltage to the bases of Tr9, 10 through differential amplifier 6. Outputs of Tr10, 11 are fed back negatively to the inversion input of amplifier 6 through differential amplifier 14, thereby changing the bias values equal to Tr10, 11 according to the input level.
JP4624079A 1979-04-16 1979-04-16 Amplifier Pending JPS55137706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4624079A JPS55137706A (en) 1979-04-16 1979-04-16 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4624079A JPS55137706A (en) 1979-04-16 1979-04-16 Amplifier

Publications (1)

Publication Number Publication Date
JPS55137706A true JPS55137706A (en) 1980-10-27

Family

ID=12741604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4624079A Pending JPS55137706A (en) 1979-04-16 1979-04-16 Amplifier

Country Status (1)

Country Link
JP (1) JPS55137706A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009058109A (en) * 2007-09-04 2009-03-19 Yazaki Corp Locking structure for protector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009058109A (en) * 2007-09-04 2009-03-19 Yazaki Corp Locking structure for protector

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