Auxiliary coil driver circuit for a cathode ray tube
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United States of America Patent
Stats
-
Feb 27, 2007
Grant Date -
Oct 20, 2005
app pub date -
Apr 16, 2003
filing date -
Apr 19, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A magnetic field compensation winding arrangement for a cathode ray tube includes a magnetic field compensation winding positioned on the cathode ray tube to compensate for an ambient magnetic field. An operational amplifier is used for generating a magnetic field compensation current in the winding. A pair of digital-to-analog converters are used for generating a pair of signals, respectively, that are coupled to the amplifier to control the magnetic field compensation current.
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