JPS5582519A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS5582519A
JPS5582519A JP15706878A JP15706878A JPS5582519A JP S5582519 A JPS5582519 A JP S5582519A JP 15706878 A JP15706878 A JP 15706878A JP 15706878 A JP15706878 A JP 15706878A JP S5582519 A JPS5582519 A JP S5582519A
Authority
JP
Japan
Prior art keywords
amplifier
gain
circuit
signal
amount
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
JP15706878A
Other languages
Japanese (ja)
Other versions
JPS6051809B2 (en
Inventor
Keizo Suehiro
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.)
DX Antenna Co Ltd
Original Assignee
DX Antenna 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 DX Antenna Co Ltd filed Critical DX Antenna Co Ltd
Priority to JP53157068A priority Critical patent/JPS6051809B2/en
Publication of JPS5582519A publication Critical patent/JPS5582519A/en
Publication of JPS6051809B2 publication Critical patent/JPS6051809B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/005—Control by a pilot signal

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To automatically compensate the change in the attenuation of input side coaxial cable due to temperature change, by automatically controlling the gain and amount of negative feedback of amplifier with the control signal obtained from the output of amplifier. CONSTITUTION:When TV signal and pilot signal are inputted to the preamplifier 10, they are amplified at the amplifier 12 and the main amplifier 74. The pilot signal detection circuit 84 detects the pilot signal and the control voltage production circuit 88 inputs this signal and inputs the control voltage to the terminals 60, 80. This control voltage flows the currents i1, i2 respectively to the automatic variable resistance circuit 63 in series with the negative feedback circuit 44 and the automatic gain control circuit 83 to adjust the feedback amount and gain so that a given frequency characteristic can be obtained. Accordingly, when the temperature varies and the attenuation of the input side coaxial cable is changed, the gain and amount of feedback are changed accordingly to keep constant the output level of the main amplifier 74.
JP53157068A 1978-12-19 1978-12-19 amplifier Expired JPS6051809B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53157068A JPS6051809B2 (en) 1978-12-19 1978-12-19 amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53157068A JPS6051809B2 (en) 1978-12-19 1978-12-19 amplifier

Publications (2)

Publication Number Publication Date
JPS5582519A true JPS5582519A (en) 1980-06-21
JPS6051809B2 JPS6051809B2 (en) 1985-11-15

Family

ID=15641518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53157068A Expired JPS6051809B2 (en) 1978-12-19 1978-12-19 amplifier

Country Status (1)

Country Link
JP (1) JPS6051809B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051705A (en) * 1990-07-10 1991-09-24 Pacific Monolithics Gain-tilt amplifier
US5546050A (en) * 1995-03-14 1996-08-13 The Boeing Company Radio frequency bus leveling system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051705A (en) * 1990-07-10 1991-09-24 Pacific Monolithics Gain-tilt amplifier
US5546050A (en) * 1995-03-14 1996-08-13 The Boeing Company Radio frequency bus leveling system

Also Published As

Publication number Publication date
JPS6051809B2 (en) 1985-11-15

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