Circuit for generating a constant high voltage for CRT deflectio

Details Circuit for generating a constant high voltage for CRT deflectio Circuit for generating a constant high voltage for CRT deflectio

1987-11-25

1989-05-09

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

315408, 315411, 358190, H02M 3335, H01J 2770

Patent

active

048294144

ABSTRACT:
A circuit for generating a constant DC high voltage responsive to an input signal having various frequencies, having a frequency-voltage converter responsive to the input signal to generate a voltage signal corresponding to the frequency of the input signal. The voltage signal is applied to an oscillation circuit and a voltage control circuit, respectively, as a control signal. The output from the oscillation circuit is coupled to one terminal of a primary coil of a flyback transformer (FBT), and the output from the voltage control circuit is coupled to the other terminal of the primary coil of the flyback transformer (FBT).

REFERENCES:
patent: 3393336 (1983-07-01), Schmidt
patent: 3745246 (1973-07-01), Kashiwagi
patent: 4574224 (1986-03-01), Nowaczyk
patent: 4649465 (1987-03-01), Kitou et al.
patent: 4673984 (1987-06-01), Kikuchi et al.
patent: 4679211 (1987-07-01), Kurz
patent: 4740877 (1988-04-01), Wharton
patent: 4774439 (1988-09-01), Butterfield et al.

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