Patent ID: 7471139

Claim:
A method of providing an output voltage from an input voltage, the method comprising: receiving an input voltage; providing the input voltage at a first input of a differential gain stage; supplying the output of the differential gain stage to the control gates of a first transistor and a second transistor, wherein the first transistor and the second transistor are connected in parallel between a first of a voltage source and a reference voltage and, respectively through a third and a fourth transistors, a second of the voltage source and the reference voltage, and wherein the first, second, third and fourth transistors are of the same type; operating the third and fourth transistors as legs of a current mirror where the control gates of the third and fourth transistors are commonly connected; providing the input of a second input differential gain stage from a node between the first and third transistors; and providing the output voltage from a node between the second and fourth transistors.