Patent ID: 8294496
Filing Date: 2012-10-23
Classification: H03K

Abstract:
1. A sawtooth generator circuit, comprising: a first triangular waveform (RG a second triangular waveform generator (RG a switching arrangement ( wherein the switching arrangement controls the first and second triangular waveform generators by switching them between ramp up and ramp down modes, as well as switching one of the triangular waveform generator signals to the output, characterized in that the sawtooth generator circuit comprises: first and second comparators at the outputs of the first and second triangular waveform generators, respectively, and a voltage source which provides a reference voltage to the first and second comparators; a latch circuit controlled by the comparator outputs, for latching in response to the comparator outputs, wherein a first latch output controls switching between the ramp up and ramp down modes of one of the triangular waveform generators and a second, complementary, latch output controls switching between the ramp up and ramp down modes of the other of the triangular waveform generators, and one of the latch outputs controls the switching of the increasing or decreasing ramps of the first and second triangular waveform generators to the output.