Patent ID: 7015750

Claim:
A method, comprising: (a) forming a differential amplifier in a transimpedance section of an amplification device; (b) coupling a first section of the differential amplifier, the first section having a plurality of elements including at least a transistor, to a second section of the differential amplifier, the second section having a plurality of elements including at least a transistor; (c) mismatching one or more of the plurality of elements in the first section with respect to corresponding ones of one or more plurality of elements in the second section, such that a systematic offset in the transimpedance stage is introduced, which makes a net offset of the amplification device unidirectional; and (d) coupling a feedback device to an output of the amplification device and an input of the differential amplifier of the transimpedance portion to provide a unidirectional offset correction to the amplification device.