CIRCUIT FOR PRE-CORRECTION OF THE VERTICAL SCAN SIGNAL OF A DISPLAY TUBE, AND TELEVISION RECEIVER COMPRISING SUCH A CIRCUIT

摘要

P THE INVENTION CONCERNS THE PRE-CORRECTION OF THE VERTICAL SCAN SIGNAL OF AN IMAGE TUBE. /P P A PRE-CORRECTION SIGNAL IS OBTAINED FROM THE SIGNAL V IN SAW TOOTH EMITTED BY THE OSCILLATOR 1 WHICH PILOT THE VERTICAL SCAN. A POLARITY INVERSION CIRCUIT 6 CONVERTS THE SAW TOOTH INTO A TRIANGULAR SIGNAL I WHICH IS USED AS A CONTROL SIGNAL TO AN ELECTRONIC POTENTIOMETER 5 WHICH ATTENUATES THE SAW TOOTH. A DIFFERENTIATOR ASSEMBLY 7 EXTRACTED FROM THE CORRECTED SAW TOOTH THE ONLY PRE-CORRECTION SIGNAL. /P P THE PRE-CORRECTION SIGNAL OBTAINED MAY BE AFFECTED, WITH THE CORRECTION RATE WANTED, AT THE SCAN SIGNAL FOR APPLICATION TO TELEVISION RECEIVERS AND VISUALIZATION CONSOLES. /P