Ramp generator using operational amplifier based integration and switched capacitor techniques

摘要

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.

主权项

1. A ramp generator circuit for generating a sawtooth waveform based on a clock signal, the ramp generator circuit comprising:
an operational amplifier having an output terminal and a negative input terminal; a first switched capacitor device within a first feedback path located between the output terminal and the negative input terminal; a first plurality of switch devices within the first feedback path, wherein 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; a second switched capacitor device within a second feedback path located between the output terminal and the negative input terminal; and a second plurality of switch devices within the second feedback path, wherein 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, each of the first alternate clock periods of the clock signal being followed by an adjacent one of the second alternate clock periods of the clock signal.