POWER SOURCE/DEFLECTION CIRCUIT

摘要

A video display system operates at a plurality of horizontal scanning rates. A voltage source produces different voltage levels, one of which is selected in response to the horizontal rate selected. A horizontal deflection circuit produces retrace pulses having amplitudes dependent on the scanning rate. A high voltage transformer has a primary winding with a number of taps. The voltage source is connected to one of the taps in response to the horizontal deflection rate selected so that the high voltage level developed across the transformer secondary winding remains substantially constant independent of changes in retrace pulse amplitude.