FR2445664A1 - Dispositif de correction automatique de distorsion et emetteur de television comportant un tel dispositif - Google Patents

Dispositif de correction automatique de distorsion et emetteur de television comportant un tel dispositif

Info

Publication number
FR2445664A1
FR2445664A1 FR7836488A FR7836488A FR2445664A1 FR 2445664 A1 FR2445664 A1 FR 2445664A1 FR 7836488 A FR7836488 A FR 7836488A FR 7836488 A FR7836488 A FR 7836488A FR 2445664 A1 FR2445664 A1 FR 2445664A1
Authority
FR
France
Prior art keywords
circuit
correction circuit
transmitter
samples
signal during
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
FR7836488A
Other languages
English (en)
Other versions
FR2445664B1 (fr
Inventor
Pierre Chabanel
Bernard Martin
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7836488A priority Critical patent/FR2445664A1/fr
Publication of FR2445664A1 publication Critical patent/FR2445664A1/fr
Application granted granted Critical
Publication of FR2445664B1 publication Critical patent/FR2445664B1/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
    • H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)

Abstract

La présente invention concerne les dispositifs de correction automatique de la non linéarité des émetteurs radio-électriques. Le dispositif comprend un correcteur à paramètres de correction ajustable électriquement 5 disposé en amont de la chaîne d'amplification à corriger 1 et traversé par des signaux à transmettre incluant des signaux de test périodiques, pris en compte par des détecteurs 11 à 13 alimentant un circuit de commande à microprocesseur 21 qui élabore la fonction de transfert de la chaîne 1 et en déduit des valeurs des paramètres du correcteur 5 affinées par une mesure directe d'un produit d'intermodulation 25. Application en particulier aux émetteurs de télévision à voie commune image et son.
FR7836488A 1978-12-27 1978-12-27 Dispositif de correction automatique de distorsion et emetteur de television comportant un tel dispositif Granted FR2445664A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7836488A FR2445664A1 (fr) 1978-12-27 1978-12-27 Dispositif de correction automatique de distorsion et emetteur de television comportant un tel dispositif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7836488A FR2445664A1 (fr) 1978-12-27 1978-12-27 Dispositif de correction automatique de distorsion et emetteur de television comportant un tel dispositif

Publications (2)

Publication Number Publication Date
FR2445664A1 true FR2445664A1 (fr) 1980-07-25
FR2445664B1 FR2445664B1 (fr) 1983-10-07

Family

ID=9216586

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836488A Granted FR2445664A1 (fr) 1978-12-27 1978-12-27 Dispositif de correction automatique de distorsion et emetteur de television comportant un tel dispositif

Country Status (1)

Country Link
FR (1) FR2445664A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162278A1 (fr) * 1984-05-10 1985-11-27 BBC Brown Boveri AG Procédé pour commander l'onde porteuse d'un émetteur modulé en amplitude et montage de circuit pour la réalisation de ce procédé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2301133A1 (fr) * 1975-02-14 1976-09-10 Thomson Csf Dispo
US4092674A (en) * 1973-03-22 1978-05-30 Tektronix, Inc. Video transmission stabilization system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092674A (en) * 1973-03-22 1978-05-30 Tektronix, Inc. Video transmission stabilization system
FR2301133A1 (fr) * 1975-02-14 1976-09-10 Thomson Csf Dispo

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SMPTE JOURNAL, vol.87, no.6, juin 1978, Scarsdale N.Y. (US) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162278A1 (fr) * 1984-05-10 1985-11-27 BBC Brown Boveri AG Procédé pour commander l'onde porteuse d'un émetteur modulé en amplitude et montage de circuit pour la réalisation de ce procédé

Also Published As

Publication number Publication date
FR2445664B1 (fr) 1983-10-07

Similar Documents

Publication Publication Date Title
EP0361452A3 (fr) Appareil et méthode de commande de gain automatique du type numérique
FR2445664A1 (fr) Dispositif de correction automatique de distorsion et emetteur de television comportant un tel dispositif
EP0388895A3 (fr) Emetteur du type à puissance variable d'émission
GB2237463A (en) Automatic volume control system responding to ambient noise
JPS5666916A (en) Automatic gain control circuit for burst signal
AU6059590A (en) Circuit arrangement for automatic gain control
JPS57107688A (en) Sampling pulse correcting system
JPS57142040A (en) Variable equalizing system
JPS5564447A (en) Digital signal transmission system
JPS5784690A (en) Automatic gain control circuit in video signal transmission system
IT1129427B (it) Filtro adattativo per segnali elettrici comprendente un circuito di ritardo
JPS5720081A (en) Secam color television receiver
SU402160A1 (ru) УСТРОЙСТВО дл АВТОМАТИЧЕСКОЙ КОРРЕКЦИИ АМПЛИТУДНО-ЧАСТОТНЫХ ИСКАЖЕНИЙ В СИСТЕМАХ
JPS5469005A (en) Automatic gain adjusting circuit
SU1029418A1 (ru) Устройство дл приема сигналов
JPS5665541A (en) Automatic equalizing system
JPS56106406A (en) Audio amplifier
JPS5675731A (en) Automatic equalizer
JPS6441833A (en) S/n ratio improving apparatus for reflected signal
JPS54156414A (en) Picture transmission unit
JPS567557A (en) Automatic gain control circuit
FR2436397A2 (fr) Montage comportant un organe de transmission non lineaire possedant une zone morte pour la suppression de la composante parasite de signaux de mesure parasites
JPS54132153A (en) Automatic equalizer circuit
JPS5745778A (en) Automatic waveform equalizer for television signal
JPS57100363A (en) Automatic frequency tracking system in radar

Legal Events

Date Code Title Description
ST Notification of lapse