Patent ID: 7180439

Claim:
A multi-path digital power supply controller, comprising: a first analog-to-digital converter (ADC) adapted to be coupled to the output of a power supply which is controlled by said controller, said power supply including a power stage which produces an output voltage having low frequency components and high frequency components, said first ADC arranged to provide a digital output which varies with the low frequency components of said power supply output; a means for subtracting a digital reference value from said digital output to produce a low frequency digital error signal; a second ADC adapted to be coupled to the output of said power supply and arranged to provide a digital output which varies with the high frequency components of said power supply output; a summing circuit which sums said low frequency digital error signal and the digital output of said second ADC; and processing circuitry arranged to produce an output which varies with said summed signal and is suitable for coupling to said power stage for use in regulating said power supply output.