Sawtooth generator with s-correction
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United States of America Patent
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-
Nov 1, 1988
Grant Date -
N/A
app pub date -
Oct 22, 1987
filing date -
Dec 24, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a vertical sawtooth generator, first and second capacitors are coupled in series to a first terminal of a switch. When the switch is conductive, the two capacitors are discharged by the switch to form a sawtooth signal at the first terminal having a down-ramping portion that corresponds with a retrace interval. When the switch is nonconductive, the two capacitors are charged by a source of current to form an upramping portion of the sawtooth signal that corresponds with a trace interval. An S-shaping arrangement that is coupled to a junction terminal of the two capacitors includes a third capacitor two resistors and a clamping arrangement that provide S-shaping of the sawtooth signal at both ends of the trace interval and dc restoring prior to the beginning of each trace interval.
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