Brightness control circuit for C.R.T.

Details Brightness control circuit for C.R.T. Brightness control circuit for C.R.T.

1989-01-23

1990-11-13

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358168, G09G 104, H04N 5235

Patent

active

049704443

ABSTRACT:
A cathode ray tube brightness control circuit includes a resistor bridge network in one arm of which is a controlled voltage level point and the other arm of which includes a brightness adjustment potentiometer. A negative feedback amplifier has its input connected to the voltage level point and its output to one end of the bridge across which a brightness control voltage supply is connected. The voltage of the supply may be adjusted to vary the range of brightness control.

REFERENCES:
patent: 3201513 (1965-08-01), Schreiner

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