JPS5720070A - Direct-current regenerating circuit for television signal - Google Patents

Direct-current regenerating circuit for television signal

Info

Publication number
JPS5720070A
JPS5720070A JP9472580A JP9472580A JPS5720070A JP S5720070 A JPS5720070 A JP S5720070A JP 9472580 A JP9472580 A JP 9472580A JP 9472580 A JP9472580 A JP 9472580A JP S5720070 A JPS5720070 A JP S5720070A
Authority
JP
Japan
Prior art keywords
output
clamping
envelope
circuit
signal
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
JP9472580A
Other languages
Japanese (ja)
Inventor
Yoshitaka Katayama
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 JP9472580A priority Critical patent/JPS5720070A/en
Publication of JPS5720070A publication Critical patent/JPS5720070A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/165—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level to maintain the black level constant

Abstract

PURPOSE:To obtain a DC stabilized TV signal easily by finding the envelope output of the synchronizing signal peak level of the output of a clamping circuit by an envelope detector, and by subtracting the envelope output from the output of the clamping circuit. CONSTITUTION:The time constant of a clamping circuit 5 composed of a capacitor, a diode and a resistance is set small enough to prevent a TV signal from having a sag. The clamping output of this circuit 5 is inputted to the 1st terminal of a subtracter 6 composed of a differential amplifier, etc., and also supplied to an envelope detector 7. This detector 7 extracts the envelope component of the clamping output and its output is inputted to the 2nd terminal of the subtractor 6 to be subtracted from the clamping output inputted to the 1st terminal of the subtracter 6. The subtracter 6 outputs the DC regeneration output of the TV signal to the next stage.
JP9472580A 1980-07-11 1980-07-11 Direct-current regenerating circuit for television signal Pending JPS5720070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9472580A JPS5720070A (en) 1980-07-11 1980-07-11 Direct-current regenerating circuit for television signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9472580A JPS5720070A (en) 1980-07-11 1980-07-11 Direct-current regenerating circuit for television signal

Publications (1)

Publication Number Publication Date
JPS5720070A true JPS5720070A (en) 1982-02-02

Family

ID=14118087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9472580A Pending JPS5720070A (en) 1980-07-11 1980-07-11 Direct-current regenerating circuit for television signal

Country Status (1)

Country Link
JP (1) JPS5720070A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58178670A (en) * 1982-04-12 1983-10-19 Alps Electric Co Ltd Video clamping circuit
JPS58213568A (en) * 1982-06-04 1983-12-12 Alps Electric Co Ltd Circuit for correcting video clamp
JPS59157363U (en) * 1983-04-06 1984-10-22 ソニー株式会社 clamp circuit
JPS62122390A (en) * 1985-09-09 1987-06-03 ヒュンダイ　エレクトロニクス　インダストリーズ　カムパニー　リミテッド Method and apparatus for compensating line inclination

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58178670A (en) * 1982-04-12 1983-10-19 Alps Electric Co Ltd Video clamping circuit
JPH0437617B2 (en) * 1982-04-12 1992-06-19 Alps Electric Co Ltd
JPS58213568A (en) * 1982-06-04 1983-12-12 Alps Electric Co Ltd Circuit for correcting video clamp
JPH0421385B2 (en) * 1982-06-04 1992-04-09 Alps Electric Co Ltd
JPS59157363U (en) * 1983-04-06 1984-10-22 ソニー株式会社 clamp circuit
JPH0227654Y2 (en) * 1983-04-06 1990-07-25
JPS62122390A (en) * 1985-09-09 1987-06-03 ヒュンダイ　エレクトロニクス　インダストリーズ　カムパニー　リミテッド Method and apparatus for compensating line inclination
JPH0568153B2 (en) * 1985-09-09 1993-09-28 Trw Inc

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