CRT scan circuit with a geometry correction independent from the scan frequency
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United States of America Patent
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Feb 10, 2004
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N/A
app pub date -
Sep 28, 1999
filing date -
Sep 30, 1998
priority date (Note) -
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Abstract
A line scan circuit for a CRT, including, in series across a switch, two oscillating circuits having the same time constant, each including, in parallel, a capacitor, a diode connected in antiparallel, and a series association of an inductor and of a voltage source, the inductor of a first one of the oscillating circuits being a scan coil of the CRT; an amplifier receiving a set-point voltage and using, as a feedback, a voltage taken from one of the oscillating circuits, and providing an adjustable voltage source to the second oscillating circuit.
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