Picture display device

Details Picture display device Picture display device

H - Electricity

04

N

350/83

H04N 5/57 (2006.01) H04N 5/59 (2006.01)

Patent

CA 1243113

ABSTRACT: The distortion of an emitter-follower output stage of a video amplifier for driving a cathode of a picture display tube can be reduced without rendering a beam current control via this output stage impossible, by using a low-distortion buffer stage for producing a negative feedback signal at the output of the output stage. A higher follow rate for small signal varia- tions can be obtained with the aid of a bias current or quiescent current which then is subtracted again from the current applied to an input of a beam measuring circuit which is controlled by the output stage.

502897

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