JPS55127710A - Amplifying circuit - Google Patents

Amplifying circuit

Info

Publication number
JPS55127710A
JPS55127710A JP3530679A JP3530679A JPS55127710A JP S55127710 A JPS55127710 A JP S55127710A JP 3530679 A JP3530679 A JP 3530679A JP 3530679 A JP3530679 A JP 3530679A JP S55127710 A JPS55127710 A JP S55127710A
Authority
JP
Japan
Prior art keywords
load
impedance
current
amplification
amplifying circuit
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
JP3530679A
Other languages
Japanese (ja)
Inventor
Hiroshi Tsurumaki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3530679A priority Critical patent/JPS55127710A/en
Publication of JPS55127710A publication Critical patent/JPS55127710A/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 the power efficiency for the load impedance by performing automatically control so that power consumption of a collecter-grounded transistor amplifying circuit may be an apporximately minimum value according to change of the value of the load impedance. CONSTITUTION:The AC signal inputted to input terminal 72 from, for example, a level-stabilized oscillator is supplied to load 21 after amplified by transistor TR33. The AC signal current supplied to load 21 is detected by a rectifier circuit dependent upon diodes 58 and 59 through minute resistance 41 and transformer 42 to control TR63. TR63 is connected in series to TR33 for amplification in DC and performs control so that the DC current of TR33 for amplification may be an optimum and minimum current for the impedance of load 21 according to impedance fluctuation of load 21.
JP3530679A 1979-03-26 1979-03-26 Amplifying circuit Pending JPS55127710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3530679A JPS55127710A (en) 1979-03-26 1979-03-26 Amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3530679A JPS55127710A (en) 1979-03-26 1979-03-26 Amplifying circuit

Publications (1)

Publication Number Publication Date
JPS55127710A true JPS55127710A (en) 1980-10-02

Family

ID=12438096

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3530679A Pending JPS55127710A (en) 1979-03-26 1979-03-26 Amplifying circuit

Country Status (1)

Country Link
JP (1) JPS55127710A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62158916U (en) * 1986-03-28 1987-10-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62158916U (en) * 1986-03-28 1987-10-08

Similar Documents

Publication Publication Date Title
JPS55109003A (en) Oscillation circuit
GB871623A (en) Improvements in or relating to magnetostatic relays
JPS57170607A (en) Amplifying circuit
JPS55127710A (en) Amplifying circuit
JPS53129569A (en) Power amplifier circuit
GB1471906A (en) Amplifier circuit having a floating input stage
JPS55138905A (en) Bias circuit of amplifier
JPS5739429A (en) Regulated power supply
JPS54160156A (en) Detection circuit
JPS5573112A (en) Power amplifying system
JPS54161305A (en) Ac amplifying device
JPS5755603A (en) Power amplifier
JPS5616311A (en) Transistor circuit
JPS5483743A (en) Alternating current amplifier
JPS5582514A (en) Protection circuit for power amplifier
JPS5569819A (en) Constant voltage unit
JPS5573113A (en) Power amplifying system
JPS558160A (en) Oscillation circuit
JPS57212808A (en) Power amplifier
FR2308247A2 (en) Low level, high isolation magnetic amplifier - has gain varying by 0.001 for 25 per cent supply variation and uses two separate cores
JPS56104506A (en) Amplifier
JPS6429916A (en) Dummy resistance circuit for constant current power source
JPS57107620A (en) Power amplifier
JPS5550739A (en) Transistor dc switch
JPS5546678A (en) Switching circuit