UN DISPOSITIVO PARA PRESENTAR UNA SENAL ANALOGICA EN LA PAN-TALLA DE PRESENTACION DE UN TUBO DE RAYOS CATODICOS

摘要

A device for displaying an analog signal on a display screen which is scanned by means of a line deflection generator and a frame deflection generator. The device comprises a signal processing device for forming a processed signal by repeating the analog signal at the line deflection frequency, a reference voltage generator for generating a reference voltage which is dependent on the frame deflection voltage, and a comparator for comparing the reference voltage and the processed signal and for generating a control signal which causes a brightening of the scanned display screen when both signals are approximately equal. In order to improve the picture quality, the device comprises means for adding a varying auxiliary signal to the processed signal. The frequency of this auxiliary signal amounts to at least ten times the line deflection frequency.