JPS5416919A - Automaic gain control circuit - Google Patents

Automaic gain control circuit

Info

Publication number
JPS5416919A
JPS5416919A JP8099177A JP8099177A JPS5416919A JP S5416919 A JPS5416919 A JP S5416919A JP 8099177 A JP8099177 A JP 8099177A JP 8099177 A JP8099177 A JP 8099177A JP S5416919 A JPS5416919 A JP S5416919A
Authority
JP
Japan
Prior art keywords
gain control
automaic
control circuit
composite video
level
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
JP8099177A
Other languages
Japanese (ja)
Other versions
JPS628990B2 (en
Inventor
Kazuo Kondo
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8099177A priority Critical patent/JPS5416919A/en
Publication of JPS5416919A publication Critical patent/JPS5416919A/en
Publication of JPS628990B2 publication Critical patent/JPS628990B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To secure a constant level for the maxmum composite video signal through a gain control by adding to the composite video signal the synchronous signal of the ratio between the luminance signal level and the synchronous signal level in opposite polarity during the back-porch period.
COPYRIGHT: (C)1979,JPO&Japio
JP8099177A 1977-07-08 1977-07-08 Automaic gain control circuit Granted JPS5416919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8099177A JPS5416919A (en) 1977-07-08 1977-07-08 Automaic gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8099177A JPS5416919A (en) 1977-07-08 1977-07-08 Automaic gain control circuit

Publications (2)

Publication Number Publication Date
JPS5416919A true JPS5416919A (en) 1979-02-07
JPS628990B2 JPS628990B2 (en) 1987-02-25

Family

ID=13733959

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8099177A Granted JPS5416919A (en) 1977-07-08 1977-07-08 Automaic gain control circuit

Country Status (1)

Country Link
JP (1) JPS5416919A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848581A (en) * 1981-09-17 1983-03-22 Matsushita Electric Ind Co Ltd Ghost eliminating device
JPS619962U (en) * 1984-06-22 1986-01-21 日本電気ホームエレクトロニクス株式会社 AGC circuit
JPS6316773U (en) * 1986-07-17 1988-02-03
US4970594A (en) * 1986-12-26 1990-11-13 Matsushita Electric Industrial Co., Ltd. Television video signal control system
JPH04236581A (en) * 1991-01-18 1992-08-25 Fuji Photo Film Co Ltd Black level correcting circuit for video signal

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062725A (en) * 1973-10-05 1975-05-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062725A (en) * 1973-10-05 1975-05-28

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848581A (en) * 1981-09-17 1983-03-22 Matsushita Electric Ind Co Ltd Ghost eliminating device
JPS619962U (en) * 1984-06-22 1986-01-21 日本電気ホームエレクトロニクス株式会社 AGC circuit
JPH024542Y2 (en) * 1984-06-22 1990-02-02
JPS6316773U (en) * 1986-07-17 1988-02-03
US4970594A (en) * 1986-12-26 1990-11-13 Matsushita Electric Industrial Co., Ltd. Television video signal control system
JPH04236581A (en) * 1991-01-18 1992-08-25 Fuji Photo Film Co Ltd Black level correcting circuit for video signal

Also Published As

Publication number Publication date
JPS628990B2 (en) 1987-02-25

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