Patent ID: 8188721

Claim:
An adaptive pulse positioning modulator for controlling a regulated output voltage, comprising: a sense circuit which provides a compensation signal indicative of output voltage error; a filter circuit having an input receiving said compensation signal and an output providing an adjust signal; a leading ramp circuit which provides a repetitive first leading edge ramp signal having a slope at a nominal level when said compensation signal is steady state and which adjusts said slope based on said adjust signal; a comparator circuit which provides a first start trigger signal when said first leading edge ramp signal reaches said compensation signal and which provides a first end trigger signal when a first trailing edge ramp signal reaches said compensation signal; a trailing ramp circuit which initiates ramping of said first trailing edge ramp signal when said first start trigger signal is provided; and pulse control logic which initiates each pulse on a first pulse-width modulation (PWM) signal when said first start trigger signal is provided and which terminates each said pulse on said first PWM signal when said first end trigger signal is provided.