JPS56126394A - Color modulating circuit - Google Patents

Color modulating circuit

Info

Publication number
JPS56126394A
JPS56126394A JP2974980A JP2974980A JPS56126394A JP S56126394 A JPS56126394 A JP S56126394A JP 2974980 A JP2974980 A JP 2974980A JP 2974980 A JP2974980 A JP 2974980A JP S56126394 A JPS56126394 A JP S56126394A
Authority
JP
Japan
Prior art keywords
waveform
potential
control input
switch
terminal
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
JP2974980A
Other languages
Japanese (ja)
Other versions
JPS625516B2 (en
Inventor
Hiroshi Iijima
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2974980A priority Critical patent/JPS56126394A/en
Publication of JPS56126394A publication Critical patent/JPS56126394A/en
Publication of JPS625516B2 publication Critical patent/JPS625516B2/ja
Granted 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
    • H04N9/65—Circuits for processing colour signals for synchronous modulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To secure an offset for a distortion in a low range to suppress a leak of the carrier wave and thus increase the stability for a color modulating circuit, by providing the clamping circuit at the both sides of two input terminals to secure a clamping at the same reference potential. CONSTITUTION:When the signal of waveform (c) is applied to the control input terminal 41, the waveform of the signal line of the terminal 61 side results into the waveform (a'). In other words, the potential of the signal line is clamped at the potential (b) of the reference power source 8 by the closed circuit of the switch 4'-1 when the control input is ''1''. Then the connection line at the side of the terminal 62 is clamped at the potential (b) as shown by the waveform (b') when the switch 4'-2 is closed with arrival of ''1'' of the control input. When the control input becomes to ''0'' with the switch 4'-2 opened, a discharge is given to the electric change that is decided by the input impedance of the modulating circuit 6.
JP2974980A 1980-03-11 1980-03-11 Color modulating circuit Granted JPS56126394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2974980A JPS56126394A (en) 1980-03-11 1980-03-11 Color modulating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2974980A JPS56126394A (en) 1980-03-11 1980-03-11 Color modulating circuit

Publications (2)

Publication Number Publication Date
JPS56126394A true JPS56126394A (en) 1981-10-03
JPS625516B2 JPS625516B2 (en) 1987-02-05

Family

ID=12284736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2974980A Granted JPS56126394A (en) 1980-03-11 1980-03-11 Color modulating circuit

Country Status (1)

Country Link
JP (1) JPS56126394A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185405A (en) * 1984-03-02 1985-09-20 Rohm Co Ltd Balanced modulation circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185405A (en) * 1984-03-02 1985-09-20 Rohm Co Ltd Balanced modulation circuit
JPH0351359B2 (en) * 1984-03-02 1991-08-06 Rohm Kk

Also Published As

Publication number Publication date
JPS625516B2 (en) 1987-02-05

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