Power supply for an electrode of a crt

Details Power supply for an electrode of a crt Power supply for an electrode of a crt

H - Electricity

01

J

313/35

H01J 29/98 (2006.01) H04N 3/185 (2006.01)

Patent

CA 2039784

ABSTRACT To produce a cathode voltage of a cathode ray tube that provides black level compensation, a secondary winding of a flyback transformer is coupled in series with a resistor, a capacitor and a rectifying diode. During flyback, a voltage pulse is developed across the capacitor at a magnitude that increases when the average value of the beam current increases. The voltage pulse causes the cathode voltage to first decrease when the beam current increases.

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