JPS551765A - Control circuit for transmission output - Google Patents

Control circuit for transmission output

Info

Publication number
JPS551765A
JPS551765A JP7499578A JP7499578A JPS551765A JP S551765 A JPS551765 A JP S551765A JP 7499578 A JP7499578 A JP 7499578A JP 7499578 A JP7499578 A JP 7499578A JP S551765 A JPS551765 A JP S551765A
Authority
JP
Japan
Prior art keywords
output
power
input
final stage
stage 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.)
Pending
Application number
JP7499578A
Other languages
Japanese (ja)
Inventor
Yasuhide Iwata
Takayuki Takai
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7499578A priority Critical patent/JPS551765A/en
Publication of JPS551765A publication Critical patent/JPS551765A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE:To pick up the specified output with maximum efficiency by controlling the output power of the preamplifier and keeping the input voltage to the final stage amplifier to an arbitrary constant value. CONSTITUTION:The output of the preamplifier 3 is inputted to the power loss unit 7 and is detected 6. The power loss unit has no loss when the input is small, and it controls power 8 with the detected value 6 so that the output can be maintained constant when the loss is more than a given value. This specified value(saturation power) can freely be set with the constant control unit 8. When the input output performance of the final stage amplifier 2 is known, the input P1 required for the specified tansmission output Po can be obtained. Further, when the controller 8 sets the power so that the saturation power of the output of the loss unit 7 is P1 and the amplifiers 2,3 and the matching circuit 4 of the transmitter are adjusted, the input more than P1 can not be inputted to the final stage amplifier 2 even if the preamplifier 3 is adjusted to a maximum. Accordingly, after this, Po is obtained by adjusting the final stage amplifier and matching circuit. In this case, the maximum collector efficiency and the specified output are in agreement.
JP7499578A 1978-06-20 1978-06-20 Control circuit for transmission output Pending JPS551765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7499578A JPS551765A (en) 1978-06-20 1978-06-20 Control circuit for transmission output

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7499578A JPS551765A (en) 1978-06-20 1978-06-20 Control circuit for transmission output

Publications (1)

Publication Number Publication Date
JPS551765A true JPS551765A (en) 1980-01-08

Family

ID=13563355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7499578A Pending JPS551765A (en) 1978-06-20 1978-06-20 Control circuit for transmission output

Country Status (1)

Country Link
JP (1) JPS551765A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61255114A (en) * 1985-05-08 1986-11-12 Yaesu Musen Co Ltd Alc circuit of linear amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61255114A (en) * 1985-05-08 1986-11-12 Yaesu Musen Co Ltd Alc circuit of linear amplifier

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