JPS5669907A - Linear amplifier - Google Patents

Linear amplifier

Info

Publication number
JPS5669907A
JPS5669907A JP14622179A JP14622179A JPS5669907A JP S5669907 A JPS5669907 A JP S5669907A JP 14622179 A JP14622179 A JP 14622179A JP 14622179 A JP14622179 A JP 14622179A JP S5669907 A JPS5669907 A JP S5669907A
Authority
JP
Japan
Prior art keywords
output
linear amplifier
circuit
modulation product
antenna
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
JP14622179A
Other languages
Japanese (ja)
Inventor
Mitsunori Morishima
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 JP14622179A priority Critical patent/JPS5669907A/en
Publication of JPS5669907A publication Critical patent/JPS5669907A/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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To reduce electric poewer consumption without making a mutual modulation product worse by controlling collector current by supervising an output level. CONSTITUTION:A radio wave from a base station is received by antenna 21 and, after being amplified by linear amplifier 22 to a constant gain, is supplied to antenna 23 at the output side. Part of the output is detected by detecting circuit 24, whose output is compared to a reference level by comparing circuit 25; and the bias value of bias circuit 26 connected between the emitter and base of the transistor of linear amplifier 22 is continuously varied by the output of the comparing circuit to control the collector current so that the mutual modulation product will not increase. While the gain of linear amplifier 22 is made constant, the cross modulation product can be maintained and the circuit can also be operated with irreducible required current consumption.
JP14622179A 1979-11-12 1979-11-12 Linear amplifier Pending JPS5669907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14622179A JPS5669907A (en) 1979-11-12 1979-11-12 Linear amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14622179A JPS5669907A (en) 1979-11-12 1979-11-12 Linear amplifier

Publications (1)

Publication Number Publication Date
JPS5669907A true JPS5669907A (en) 1981-06-11

Family

ID=15402840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14622179A Pending JPS5669907A (en) 1979-11-12 1979-11-12 Linear amplifier

Country Status (1)

Country Link
JP (1) JPS5669907A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560468A1 (en) * 1984-02-28 1985-08-30 Lgt Lab Gen Telecomm TRANSISTOR AMPLIFIER STAGE POLARIZATION DEVICE AND ITS USE IN SUCH A FLOOR
JPH01170227A (en) * 1987-12-25 1989-07-05 Hitachi Ltd Transmission power control system
JPH08256018A (en) * 1995-03-16 1996-10-01 Nec Corp Power consumption control circuit for high-frequency linear amplifier
EP0829954A1 (en) * 1996-09-12 1998-03-18 Nokia Mobile Phones Ltd. Amplifier system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104760A (en) * 1978-02-03 1979-08-17 Nec Corp Amplifier of low power consumption type

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104760A (en) * 1978-02-03 1979-08-17 Nec Corp Amplifier of low power consumption type

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560468A1 (en) * 1984-02-28 1985-08-30 Lgt Lab Gen Telecomm TRANSISTOR AMPLIFIER STAGE POLARIZATION DEVICE AND ITS USE IN SUCH A FLOOR
US4599577A (en) * 1984-02-28 1986-07-08 Thomson Csf Transistorized amplification stage with improved polarization device
JPH01170227A (en) * 1987-12-25 1989-07-05 Hitachi Ltd Transmission power control system
JPH08256018A (en) * 1995-03-16 1996-10-01 Nec Corp Power consumption control circuit for high-frequency linear amplifier
EP0829954A1 (en) * 1996-09-12 1998-03-18 Nokia Mobile Phones Ltd. Amplifier system

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