Patent ID: 7336129

Claim:
A circuit comprising: a first transistor and a second transistor arranged to form a current mirror, gates of the transistors of the current mirror being operatively coupled, and a drain of the first transistor of the current mirror being operatively coupled to the gate of the first transistor of the current mirror; at least two transistors operatively coupled to the current mirror, wherein the transistors are arranged to form a differential pair amplifier, wherein a drain of each of the two transistors arranged to form the differential pair is operatively coupled to a drain of a first transistor of the current mirror; and a follower transistor operatively coupled to the current mirror and to the differential pair, wherein the transistors of the differential pair, the current mirror, and the follower transistor are operatively coupled such that during operation an amplitude of a signal output from the follower transistor is proportional to an amplitude of an signal input into the differential pair.