Patent ID: 9385593
Filing Date: 2016-07-05
CPC Classification: H02M,H03F,Y02B

Claim Text:
1. A voltage supply comprising: a charge pump coupled to a power source and configured to output a pulse-width modulated voltage based upon an input voltage from the power source; a low-pass filter comprising an output capacitor, the output capacitor configured to average the pulsed-width modulated voltage and output a filtered voltage having a value different than that of the input voltage; a controller configured to selectively decouple the charge pump from the power source when a load imposed on the low-pass filter is below a threshold load, the load imposed on the low-pass filter being based upon a load control signal, the load control signal comprising a digital signal, the digital signal comprising a series of sampled values; an analyzer configured to analyze the load control signal, estimate whether the load is below the threshold load, and selectively operate the controller based upon the estimate of whether the load is below the threshold load.