Patent ID: 7138835

Claim:
An equalizing buffer, comprising: an input circuit coupled to receive an input signal exhibiting attenuated content at a frequency, wherein the input circuit comprises a differential amplifier coupled to receive the input signal having first and second polarities, and wherein the differential amplifier comprises: a first transistor of a first conduction type having a control terminal coupled to receive the first polarity of the input signal and a first conductor coupled to a first node of the input circuit; and a second transistor of the first conduction type having a control terminal coupled to receive the second polarity of the input signal and a first conductor coupled to the first node of the input circuit; an active load coupled to the input circuit at a first output node and coupled to provide an output signal at the first output node in response to the input signal, wherein the active load comprises: a third transistor of a second conduction type having a first conductor coupled to a second conductor of the first transistor at the first output node; and a fourth transistor of the second conduction type having a first conductor coupled to a second conductor of the second transistor at a second output node; and a feedback network coupled across a control terminal of the active load and the first output node and coupled to receive a feedback control signal, the feedback network configured to substantially equalize the attenuated content in response to the feedback control signal and, wherein the feedback network comprises: a fifth transistor of the second conduction type having a control terminal coupled to receive the feedback signal, a first conductor coupled to the first output node and a second conductor coupled to a control terminal of the third transistor; and a sixth transistor of the second conduction type having a control terminal coupled to receive the feedback signal, a first conductor coupled to the second output node and a second conductor coupled to a control terminal of the fourth transistor.