Patent ID: 7224156

Claim:
A voltage regulator comprising: a first stage having a first current, a second stage, coupled to the first stage, and having a second current; and a third stage, coupled to the second stage, outputting an output voltage and having a third current, wherein the first, second and third currents are proportional to each other throughout a range of operation of the voltage regulator, wherein the third stage includes a pass transistor, and the second stage includes a first mirror transistor and an input transistor in series with the first mirror transistor, wherein a gate of the first mirror transistor is driven by the same voltage as a gate of the pass transistor, wherein the first stage further includes a second mirror transistor, wherein a gate of the second mirror transistor is driven by the same voltage as the gate of the pass transistor, and a low pass filter between the gate of the second mirror transistor and the gate of the first mirror transistor.