Patent ID: 7948309

Claim:
An amplifier circuit comprising: a transconductance amplifier at an input side of the amplifier circuit; a transimpedance amplifier connected to an output of the transconductance amplifier, the transconductance amplifier and the transimpedance amplifier forming a low-impedance node at an interface thereof; a voltage amplifier having a gain greater than 1 connected to an output of the transimpedance amplifier; and a feedback circuit connected between an output of the voltage amplifier and the low-impedance node between the transconductance amplifier and the transimpedance amplifier, wherein the transconductance amplifier, the transimpedance amplifier, and the voltage amplifier form a main amplifier stage, and wherein the feedback circuit senses an imbalance in an output of the main amplifier stage, whereby a correction signal is integrated and negatively fed back to the low-impedance node between the transconductance amplifier and the transimpedance amplifier.