Patent ID: 7091754

Claim:
An output driver circuit comprising: an output block comprising: a differential preamplifier adapted to receive a differential input voltage signal and a differential control voltage signal and to generate a first differential voltage signal; and a source-follower stage adapted to receive the first differential voltage signal and generate a differential output voltage; a replication block comprising: a differential preamplifier adapted to receive first and second supply voltages and generate a second differential voltage signal; and a source-follower stage adapted to receive the second differential voltage signal and generate a third differential voltage signal; and a control block adapted to receive the third differential voltage signal and generate the differential control voltage applied to the output block, wherein said differential preamplifier of the output block comprises; first and second transistors adapted to receive the differential input voltage signal; and third and fourth transistors adapted to receive a first one of the differential control voltage, wherein the third transistor is an active load transistor coupled in series with the first transistor and the fourth transistor is an active load transistor coupled in series with the second transistor.