Parabolic-wave shaping circuit for focus-correction
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United States of America Patent
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Jun 9, 1998
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app pub date -
Apr 21, 1997
filing date -
Mar 7, 1995
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Abstract
A parabolic-wave shaping circuit for focus-correction which can output only the necessary part of a parabolic-waveform for focus-correction is constructed so as to clip an output waveform of an output amplifier amplifying a parabolic-wave having a horizontal scanning period for a period of a blanking time of a video signal with a clipping circuit composed of a diode and a variable voltage-regulating resistor for adjusting the clipping level.
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