JPS577604A - Gain correcting circuit - Google Patents

Gain correcting circuit

Info

Publication number
JPS577604A
JPS577604A JP8014880A JP8014880A JPS577604A JP S577604 A JPS577604 A JP S577604A JP 8014880 A JP8014880 A JP 8014880A JP 8014880 A JP8014880 A JP 8014880A JP S577604 A JPS577604 A JP S577604A
Authority
JP
Japan
Prior art keywords
circuit
constant
gain
tuner
holding
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
JP8014880A
Other languages
Japanese (ja)
Other versions
JPH0131330B2 (en
Inventor
Fumiaki Shibata
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8014880A priority Critical patent/JPS577604A/en
Publication of JPS577604A publication Critical patent/JPS577604A/en
Publication of JPH0131330B2 publication Critical patent/JPH0131330B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To correct variance in the gain of an IC by adjusting the impedance of a tank circuit provided for correction while holding the resonance sharpness of an intermediate frequency tuning circuit, which is composed of the IC, of a TV tuner constant. CONSTITUTION:An IC12 used for a TV tuner has an incorporated double balancing type IF amplifier 11 together with a mixer and a local oscillating circuit. To the terminal 13 of the IC12, a tank circuit 14 consisting of a variable volume control 15, a variable inductor 16 and a trimmer capacitor 17 connected in parallel is connected. In an intermediate frequency tuning circuit to which the circuit 14 is connected, the volume control 15 is varied so that the product of the inductance of the inductor 16 and the capacitance of the capacitor 17 is constant, thereby making the band width constant while holding the resonance shaprness constant. The circuit 14 like this is added to correct variance in the gain of the IC.
JP8014880A 1980-06-16 1980-06-16 Gain correcting circuit Granted JPS577604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8014880A JPS577604A (en) 1980-06-16 1980-06-16 Gain correcting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8014880A JPS577604A (en) 1980-06-16 1980-06-16 Gain correcting circuit

Publications (2)

Publication Number Publication Date
JPS577604A true JPS577604A (en) 1982-01-14
JPH0131330B2 JPH0131330B2 (en) 1989-06-26

Family

ID=13710192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8014880A Granted JPS577604A (en) 1980-06-16 1980-06-16 Gain correcting circuit

Country Status (1)

Country Link
JP (1) JPS577604A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7816990B2 (en) 2003-03-17 2010-10-19 Panasonic Corporation Variable gain amplification circuit
JP2017169015A (en) * 2016-03-16 2017-09-21 日本電信電話株式会社 Variable gain amplifier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5181051U (en) * 1974-12-20 1976-06-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5181051U (en) * 1974-12-20 1976-06-28

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7816990B2 (en) 2003-03-17 2010-10-19 Panasonic Corporation Variable gain amplification circuit
JP2017169015A (en) * 2016-03-16 2017-09-21 日本電信電話株式会社 Variable gain amplifier

Also Published As

Publication number Publication date
JPH0131330B2 (en) 1989-06-26

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