Compensation for drift in a cathode ray tube

Details Compensation for drift in a cathode ray tube Compensation for drift in a cathode ray tube

H - Electricity

01

J

H01J 29/52 (2006.01) H04N 1/40 (2006.01) H04N 5/59 (2006.01)

Patent

CA 2041019

ABSTRACT OF THE DISCLOSURE A circuit which compensates for the effects of drift that occur during the operation of a cathode ray tube because of temperature changes or aging and which produces changes in intensity of the picture on the cathode ray tube by sensing the intensity changes and varying the bias on the second grid of the cathode ray tube to restore the desired intensity.

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