Patent ID: 8466634
Filing Date: 2013-06-18
Classification: H05B

Abstract:
1. A driver circuit, comprising: a first controller coupled to receive a first input and produce a first intermittent output proportional to a value of the first input relative to first upper and lower threshold values; a first phase detector coupled to receive the first intermittent output and a reference value, and to produce a first series of control pulses whose density is proportional to a phase difference between the first input and the reference value; a first threshold controller coupled to receive the first series of control pulses and configured to modify the first upper and lower threshold values in accordance with the density of the first series of control pulses; a second controller coupled to receive a second input and produce a second intermittent output proportional to a value of the second input relative to second upper and lower threshold values; a second phase detector coupled to receive the second intermittent output and the first intermittent output, and to produce a second series of control pulses whose density is proportional to a phase difference between the second intermittent output and the first intermittent output; and a second threshold controller coupled to receive the second series of control pulses and for modifying, in proportion to the density of the second series of control pulses, the second upper and lower threshold values.