Fast-start vertical current feedback circuit

Details Fast-start vertical current feedback circuit Fast-start vertical current feedback circuit

1977-12-14

1979-07-10

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315389, 315393, H01J 2970, H01J 2972

Patent

active

041609360

ABSTRACT:
A vertical deflection amplifier includes a preamplifier having an input at which is applied a DC feedback signal for the stabilization of the amplifier's DC output. In order to assure an undistorted or unattenuated vertical deflection upon initial turn-on of the receiver, a fast-start circuit superimposes a transient voltage on the DC feedback signal. The fast-start circuit allows the amplifier's output to reach its quiescent DC output level in a period of time that is substantially shorter than the time constant of a sampling network from which the DC feedback signal is derived.

REFERENCES:
patent: 3758814 (1973-09-01), Tang
patent: 3947723 (1976-03-01), Thompson
patent: 4054816 (1977-10-01), Keidl

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