Patent ID: 7888996

Claim:
An apparatus comprising: an input stage that receives an differential input signal and a first clock signal; a first amplifier that receives the differential input signal; a track-and-hold (T/H) circuit that is coupled so as to receive a differential output signal from the input stage and that receives a second clock signal, wherein the T/H circuit generates a first signal that corresponds to a positive portion of the differential output signal from the input stage, and wherein the T/H circuit generates a second signal that corresponds to a negative portion of the differential output signal from the input stage; a second amplifier that is coupled to the T/H circuit so as to receive the first signal; a third amplifier that is coupled to the T/H circuit so as to receive the second signal; and a fourth amplifier that is coupled to the first, second, and third amplifiers so as to receive the combined output signals from the first, second, and third amplifiers.