Patent ID: 7057447

Claim:
A voltage regulator formed on an integrated circuit, comprising: a single voltage source comprising a reference voltage source, the reference voltage source operable to provide a reference voltage; a bias voltage generator coupled to the reference voltage source, the bias voltage generator operable to generate a bias voltage based on the reference voltage; and an error amplifier coupled to the reference voltage source and the bias voltage generator, the error amplifier operable to amplify, based on the bias voltage, a difference between the reference voltage and a feedback voltage to generate an amplifier voltage; wherein the bias voltage generator comprises a p-channel MOSFET and an n-channel MOSFET, a source of the p-channel MOSFET is coupled to the reference voltage source, and a gate and a drain of the p-channel MOSFET and a gate and a drain of the n-channel MOSFET are coupled to the error amplifier.