Ramp generator using operational amplifier based integration and switched capacitor techniques
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United States of America Patent
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Aug 12, 2014
Grant Date -
N/A
app pub date -
Jun 27, 2013
filing date -
Jun 27, 2013
priority date (Note) -
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Abstract
A ramp generator circuit for generating sawtooth waveforms based on a clock signal may include an operational amplifier, a first switched capacitor device within a first feedback path of the operational amplifier, and a first plurality of switch devices within the first feedback path, whereby upon actuation of the first plurality of switches, the first switched capacitor generates first ramp waveforms during first alternate clock periods of the clock signal. The circuit may also include a second switched capacitor device within a second feedback path of the operational amplifier, and a second plurality of switch devices within the second feedback path, whereby upon actuation of the second plurality of switches, the second switched capacitor generates second ramp waveforms during second alternate clock periods of the clock signal. The first alternate clock periods of the clock are followed by an adjacent one of the second alternate clock periods of the clock.
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