Patent ID: 7697905

Claim:
An apparatus comprising: a differential driver to receive a baseband signal from a transconductance stage and to drive the baseband signal, wherein the differential driver includes a gain stage across positive and negative differential inputs of the differential driver to adjust a gain of the baseband signal, in which the differential driver also drives a first cancellation current at the differential inputs to cancel a feedthrough offset between the positive and negative differential inputs of the differential driver that results at a baseband frequency and in which the first cancellation current is subject to proportional gain adjustment by the gain stage as the baseband signal, and the differential driver drives a second cancellation current at a differential output of the differential driver to cancel a feedthrough offset that results at a radio frequency (RF) that is coupled back to the differential driver from a RF stage; and a load coupled to the differential driver to be driven by the differential driver, in which RF and baseband frequency offsets between positive and negative sides of the differential driver are cancelled.