Video amplifier for displaying four or more video levels on a ca

Details Video amplifier for displaying four or more video levels on a ca Video amplifier for displaying four or more video levels on a ca

1978-02-13

1979-12-04

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 30, H01J 2952

Patent

active

041774094

ABSTRACT:
A video amplifier for decoding a digital signal input and providing at least three video brightness levels plus a black level to a cathode ray tube is disclosed. The amplifier includes input logic decoding circuitry for providing control signals to a plurality of switching elements which vary the voltage level of a video output signal. The video signal has at least four discrete voltage levels corresponding to a black, dim, normal, or bright display. The amplifier is preferably mounted on the socket of the cathode ray tube and provides a bandwidth on the order of 75 to 100 MHz.

REFERENCES:
patent: 2547298 (1951-04-01), Smart
patent: 3946275 (1976-03-01), Marino
Jean-Claude Roy, A High-Resolution Raster Scan Display, Hewlett-Packard Journal, vol. 26, No. 10, pp. 11-15, Jun. 75.

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