JPS56110391A - Automatic gain control circuit of television signal - Google Patents

Automatic gain control circuit of television signal

Info

Publication number
JPS56110391A
JPS56110391A JP1319480A JP1319480A JPS56110391A JP S56110391 A JPS56110391 A JP S56110391A JP 1319480 A JP1319480 A JP 1319480A JP 1319480 A JP1319480 A JP 1319480A JP S56110391 A JPS56110391 A JP S56110391A
Authority
JP
Japan
Prior art keywords
circuit
signal
control circuit
output
delay
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
JP1319480A
Other languages
Japanese (ja)
Inventor
Taku Kamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1319480A priority Critical patent/JPS56110391A/en
Publication of JPS56110391A publication Critical patent/JPS56110391A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Television Signal Processing For Recording (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To ensure an agreement of amplitude between a delayed TV signal and a nondelayed TV signal for a comb-shaped filter that is used for process of the TV signal, by securing an automatic control for the level between the two input signals of a circuit that extracts the differential component between the signal having a delay of 1H and the signal having no delay. CONSTITUTION:The 1H delay circuit 2, differential component extracting circuit 3 amplitude control circuit 4 and adder circuit 5 are provided between the input terminal 1 and the output terminal 6. Thus a comb-shaped filter is obtained. In this case, the gain control circuit 8 is installed between the circuits 2 and 3, and the output side of the circuit 3 is connected to the circuit 8 via the wave detection circuit 7. The circuit 7 delivers the signal corresponding to the mutual amplitude difference of the signals obtained before and after vertical synchronous signal part of a TV signal that is obtained at the output of the circuit 3. The circuit 8 controls the normal gain of the TV signal by the output of the circuit 7.
JP1319480A 1980-02-05 1980-02-05 Automatic gain control circuit of television signal Pending JPS56110391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1319480A JPS56110391A (en) 1980-02-05 1980-02-05 Automatic gain control circuit of television signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1319480A JPS56110391A (en) 1980-02-05 1980-02-05 Automatic gain control circuit of television signal

Publications (1)

Publication Number Publication Date
JPS56110391A true JPS56110391A (en) 1981-09-01

Family

ID=11826344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1319480A Pending JPS56110391A (en) 1980-02-05 1980-02-05 Automatic gain control circuit of television signal

Country Status (1)

Country Link
JP (1) JPS56110391A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61121574A (en) * 1984-11-19 1986-06-09 Hitachi Ltd Video signal processing circuit
JPH02312378A (en) * 1989-05-26 1990-12-27 Nec Ic Microcomput Syst Ltd Dropout correction circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61121574A (en) * 1984-11-19 1986-06-09 Hitachi Ltd Video signal processing circuit
JPH0523544B2 (en) * 1984-11-19 1993-04-05 Hitachi Ltd
JPH02312378A (en) * 1989-05-26 1990-12-27 Nec Ic Microcomput Syst Ltd Dropout correction circuit

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