Dynamic focus circuit

Details Dynamic focus circuit Dynamic focus circuit

H - Electricity

01

J

355/10

H01J 29/58 (2006.01) H01J 29/56 (2006.01) H01J 29/70 (2006.01) H04N 3/26 (2006.01)

Patent

CA 1278104

ABSTRACT: A dynamic beam current focussing circuit for providing improved focussing across the screen of a cathode ray video display tube utilizes a tuned voltage step-up transformer to achieve sufficient amplitude of horizontal sweep waveform components of the dynamic focus- sing voltage. The circuit is useful for high definition television and video display units.

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