Patent ID: 7557651

Claim:
An apparatus comprising: a plurality of amplifiers, wherein each amplifier includes: a plurality of input sets, wherein each input set is amplified by a transconductance to form an amplified signal; and a summation node, wherein the summation node aggregates at least two amplified signals to create an aggregate amplified signal; and a resistor that is coupled to an output of a first amplifier from the plurality of amplifiers to at least one input from the input set of the first amplifier and to at least one input from the input set of a second amplifier from the plurality of amplifiers such that an overall transconductance of the first and second amplifiers is the difference the transconductances of the first and second amplifiers to a common mode signal and the overall transconductance of the first and second amplifiers is the sum of the transconductances of the first and second amplifiers to differential signal.