Patent ID: 6600299
Filing Date: 2003-07-29
Classification: G05F

Abstract:
A modified Miller-compensated voltage regulator having a unity gain frequency, the voltage regulator comprising:an input error amplifier stage comprising a differential amplifier having an output, a first input and a second input; an inverting inter-stage variable gain amplifier having an output, a first input in communication with the differential amplifier output, and a second input connected to a dc voltage referenced to ground; a unity gain buffer amplifier stage having an output, and further having an input in communication with the inverting inter-stage amplifier output; a power NMOS having a gate in communication with the unity gain buffer amplifier stage output, a drain coupled to a supply voltage and a source that is configured to provide a regulated output voltage; and a compensating capacitor coupled at one end to the source of the power NMOS and coupled at its other end to the output of the input error amplifier stage to provide a compensation loop having internal poles and a unity gain frequency associated therewith.