Device for displaying an analog signal on a display screen

Details Device for displaying an analog signal on a display screen Device for displaying an analog signal on a display screen

1980-06-05

1982-04-13

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2952

Patent

active

043250092

ABSTRACT:
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.

REFERENCES:
patent: 3772679 (1973-11-01), Scheer

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