FR2451139A1 - Circuit de verrouillage pour un signal video - Google Patents

Circuit de verrouillage pour un signal video

Info

Publication number
FR2451139A1
FR2451139A1 FR8004597A FR8004597A FR2451139A1 FR 2451139 A1 FR2451139 A1 FR 2451139A1 FR 8004597 A FR8004597 A FR 8004597A FR 8004597 A FR8004597 A FR 8004597A FR 2451139 A1 FR2451139 A1 FR 2451139A1
Authority
FR
France
Prior art keywords
video signal
amplifier
lock circuit
output
input
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
FR8004597A
Other languages
English (en)
Other versions
FR2451139B1 (fr
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2451139A1 publication Critical patent/FR2451139A1/fr
Application granted granted Critical
Publication of FR2451139B1 publication Critical patent/FR2451139B1/fr
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Manipulation Of Pulses (AREA)
  • Amplifiers (AREA)

Abstract

CE CIRCUIT EST FORME D'UN AMPLIFICATEUR DE DIFFERENCE DONT LA SORTIE EST, PAR L'INTERMEDIAIRE D'UNE DIODE, A LA FOIS CONNECTEE A LA SORTIE DE COMMUTATION ET COUPLEE EN RETOUR VERS UNE ENTREE DE L'AMPLIFICATEUR QUI EST CONNECTEE EN OUTRE PAR L'INTERMEDIAIRE D'UNE RESISTANCE A UNE BORNE PORTANT UNE TENSION DE REFERENCE; LA SORTIE DE L'AMPLIFICATEUR EST EN OUTRE CONNECTEE A UN CIRCUIT DE CHARGE POUR UN CONDENSATEUR QUI EST CONNECTE A L'AUTRE ENTREE DE L'AMPLIFICATEUR RECEVANT LE SIGNAL VIDEO. APPLICATION: CONSTRUCTION D'APPAREILS DE TELEVISION.
FR8004597A 1979-03-05 1980-02-29 Circuit de verrouillage pour un signal video Granted FR2451139A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7901722A NL7901722A (nl) 1979-03-05 1979-03-05 Klemschakeling voor een videosignaal.

Publications (2)

Publication Number Publication Date
FR2451139A1 true FR2451139A1 (fr) 1980-10-03
FR2451139B1 FR2451139B1 (fr) 1982-07-16

Family

ID=19832743

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8004597A Granted FR2451139A1 (fr) 1979-03-05 1980-02-29 Circuit de verrouillage pour un signal video

Country Status (6)

Country Link
US (1) US4296437A (fr)
JP (1) JPS55118275A (fr)
DE (1) DE3007466A1 (fr)
FR (1) FR2451139A1 (fr)
GB (1) GB2048013B (fr)
NL (1) NL7901722A (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58178670A (ja) * 1982-04-12 1983-10-19 Alps Electric Co Ltd ビデオ・クランプ回路
GB2148636A (en) * 1983-09-15 1985-05-30 Sinclair Res Ltd Improvements in or relating to television receivers
DE3618939A1 (de) * 1986-06-05 1987-12-10 Philips Patentverwaltung Schaltungsanordnung zum einstellen eines referenzpegels in einem periodischen signal
DE3625702A1 (de) * 1986-07-30 1988-02-11 Siemens Ag Schaltungsanordnung zum klemmen von videosignalen
US5003564A (en) * 1989-04-04 1991-03-26 Rca Licensing Corporation Digital signal clamp circuitry
US4965669A (en) * 1989-04-12 1990-10-23 Rca Licensing Corporation Apparatus for digitally controlling the D.C. value of a processed signal
DE3925329A1 (de) * 1989-07-31 1991-02-07 Siemens Ag Schaltungsanordnung zum regeln der amplitude von videosignalen
US5099366A (en) * 1989-08-25 1992-03-24 Ampex Corporation Low frequency restorer
US5027017A (en) * 1990-01-19 1991-06-25 Rca Licensing Corporation Sync tip clamp circuitry
MY105454A (en) * 1990-04-30 1994-10-31 Thomson Comsumer Electronics Inc Television signal processing circuits.
US5272522A (en) * 1990-04-30 1993-12-21 Thomson Consumer Electronics, Inc. Video signal processing circuits
FR2755805B1 (fr) * 1996-11-14 1998-12-11 Thomson Broadcast Systems Circuit d'amplification comprenant un dispositif de compensation de courant d'entree
US7652723B1 (en) 2004-04-19 2010-01-26 Video Accessory Corporation Composite video signal correction unit for video imaging and video recording systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955047A (en) * 1974-04-16 1976-05-04 Rca Corporation D.C. reinsertion in video amplifier
US3927255A (en) * 1974-05-01 1975-12-16 Rca Corp Black level clamping circuit for a television signal processor
DE2433452A1 (de) * 1974-07-11 1976-01-22 Standard Elektrik Lorenz Ag Schaltungsanordnung zum klemmen eines videosignales
DE2810706A1 (de) * 1978-03-11 1979-09-13 Bosch Gmbh Robert Schaltanordnung zur wiedereinfuehrung der gleichspannungskomponente

Also Published As

Publication number Publication date
US4296437A (en) 1981-10-20
DE3007466A1 (de) 1980-09-18
GB2048013A (en) 1980-12-03
GB2048013B (en) 1983-03-16
NL7901722A (nl) 1980-09-09
FR2451139B1 (fr) 1982-07-16
JPS55118275A (en) 1980-09-11

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Legal Events

Date Code Title Description
ST Notification of lapse