Ramp generator with fast reset
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United States of America Patent
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Jun 17, 2008
Grant Date -
N/A
app pub date -
Jul 14, 2005
filing date -
Jul 14, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An efficient ramp generator uses a reversing switch array to couple a timing capacitor in alternating polarities between an input terminal and an output terminal of an operational amplifier to generate a periodic ramp signal without discharging the timing capacitor between voltage ramps. The reversing switch array includes at least four semiconductor switches controlled by a flip-flop circuit or a latch circuit. The flip-flop circuit or the latch circuit can be driven by an external clock signal or an internal clock signal with a variable frequency.
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