Patent ID: 9509214
Filing Date: 2016-11-29
CPC Classification: H02M

Claim Text:
1. A voltage regulator comprising: a differencing circuit to generate an error signal based on a difference between a reference voltage and an output voltage of said voltage regulator; a proportional control circuit coupled to said differencing circuit, said proportional control circuit to generate a control signal proportional to said error signal; a derivative control circuit coupled to said differencing circuit, said derivative control circuit to generate a control signal based on a derivative of said error signal; a summer circuit coupled to said proportional control circuit and said derivative control circuit, said summer circuit to sum said proportional control signal and said derivative control signal; a pulse width modulated (PWM) signal generator circuit coupled to said summer circuit, said PWM generator circuit to adjust said PWM modulation based on said summed control signal; and a state monitor circuit to determine when said output voltage enters a steady state and to adjust a gain of said proportional control signal and said derivative control signal based on said determination, wherein said gain of said derivative control signal is decreased a predetermined programmable period of time after said state monitor circuit determines said output voltage entered said steady state.