JPS5571306A - Agc circuit - Google Patents

Agc circuit

Info

Publication number
JPS5571306A
JPS5571306A JP14557178A JP14557178A JPS5571306A JP S5571306 A JPS5571306 A JP S5571306A JP 14557178 A JP14557178 A JP 14557178A JP 14557178 A JP14557178 A JP 14557178A JP S5571306 A JPS5571306 A JP S5571306A
Authority
JP
Japan
Prior art keywords
agc
circuit
signal
signals
output
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
JP14557178A
Other languages
Japanese (ja)
Other versions
JPS6046887B2 (en
Inventor
Yasuaki Inoue
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo 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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP53145571A priority Critical patent/JPS6046887B2/en
Publication of JPS5571306A publication Critical patent/JPS5571306A/en
Publication of JPS6046887B2 publication Critical patent/JPS6046887B2/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
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3068—Circuits generating control signals for both R.F. and I.F. stages

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To make it possible to obtain a good AGC characteristic by synthesizing AGC signals, which are obtained by subjecting the output of a RF signal amplifier circuit to AGC detection, and AGC signals, which have IF signals detected, and supplying the synthesized result to a RF amplifier circuit. CONSTITUTION:Signals which have IF signals detected by 15 are applied to AGC signal generation circuit 19 through LPF 18, and the output of circuit 19 is supplied to delay circuit 20, and the first AGC signal is outputted from circuit 20. Meanwhile, output signals of RF signal amplifier circuit 12 are subjected to AGC detection in 21 to obtain the second AGC signal, and the second AGC signal and the first AGC signal above are synthesized by 22, and the obtained synthesized by 22, and the obtained synthesized signal is sent to circuit 21 through LPF 23. Then, when turning is slipped, the proportion of the second AGC signal included in circuit 22 is increased; and when detuning is generated further, the second AGC signal is increased according to increment of the output of circuit 12 to prevent the output of circuit 12 from being a value over a certain value. As a result, a good AGC characteristic can be obtained.
JP53145571A 1978-11-24 1978-11-24 AGC circuit Expired JPS6046887B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53145571A JPS6046887B2 (en) 1978-11-24 1978-11-24 AGC circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53145571A JPS6046887B2 (en) 1978-11-24 1978-11-24 AGC circuit

Publications (2)

Publication Number Publication Date
JPS5571306A true JPS5571306A (en) 1980-05-29
JPS6046887B2 JPS6046887B2 (en) 1985-10-18

Family

ID=15388185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53145571A Expired JPS6046887B2 (en) 1978-11-24 1978-11-24 AGC circuit

Country Status (1)

Country Link
JP (1) JPS6046887B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0461505A (en) * 1990-06-29 1992-02-27 Sanyo Electric Co Ltd Agc circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01202246A (en) * 1988-02-06 1989-08-15 Miyamura Tekkosho:Kk Steamer for manufacturing green tea

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52149055A (en) * 1976-06-07 1977-12-10 Hitachi Ltd Gain control circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52149055A (en) * 1976-06-07 1977-12-10 Hitachi Ltd Gain control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0461505A (en) * 1990-06-29 1992-02-27 Sanyo Electric Co Ltd Agc circuit

Also Published As

Publication number Publication date
JPS6046887B2 (en) 1985-10-18

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