Constant current power circuit for horizontal deflection of cathode ray tube
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United States of America Patent
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-
Feb 10, 1987
Grant Date -
N/A
app pub date -
Mar 27, 1985
filing date -
Mar 27, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit for providing input power to the horizontal deflection coil or yoke for a raster scan type of cathode ray tube. The circuit includes a closed loop current sensor which uses an operational amplifier to compare the sensed current with an adjustable reference voltage to provide a control for the current, thereby providing a constant current power source for a resonant deflection yoke flyback circuit. The current drive and S shaping capacitor are directly coupled to the deflection coil, omitting a coupling transformer and a linearity coil.
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