A multiphase ripple voltage regulator generator employs a hysteretic comparator
referenced to upper and lower voltage thresholds. The hysteretic comparator monitors
a master ripple voltage waveform developed across a capacitor supplied with a current
proportional to the difference between the output voltage and either the input
voltage or ground. The output of the hysteretic comparator generates a master clock
signal that is sequentially coupled to PWM latches, the states of which define
the durations of respective components of the synthesized ripple voltage. A respective
PWM latch has a first state initiated by a selected master clock signal and terminated
by an associated phase voltage comparator that monitors a respective phase node voltage.
