Patent ID: 7961817

Claim:
In association with a receiver configured to receive a first input signal, an input signal compensation circuit comprising: a first feedback loop adapted to receive a feedback signal, corresponding to data detected from said first input signal, and further adapted to generate a baseline wander correction component in response to said feedback signal; a second feedback loop configured to generate a common-mode voltage related to a selected reference voltage associated with said first input signal; a combining mechanism for combining said baseline wander correction component with said common-mode voltage, for use in providing a reconstructed correction component for said first input signal; wherein said feedback signal is a digital feedback signal; wherein said first feedback loop further comprises one or more switches, wherein each of said switches is operated by said digital feedback signal to generate a pulsed current that represents said feedback signal, and further represents a selected gain adjustment to compensate for baseline wander in said first input signal; wherein said combining mechanism includes a summer for combining said pulsed current with a current supplied by said second feedback loop that represents said common-mode voltage; and wherein said second feedback loop comprises a comparator and a dynamic common-mode current injection device connected to receive an output of the comparator, and to supply current that represents said common-mode voltage in response to said output of the comparator.