Patent ID: 8536939

Claim:
An operational amplifier arranged in a feedback configuration, the operational amplifier comprising: a plurality of amplifiers connected to form a plurality of at least partially distinct amplification paths extending from an input terminal to an output terminal of the operational amplifier, each of the amplification paths including a respective subset of the plurality of amplifiers connected in series, at least one of the plurality of amplification paths having at least three of the amplifiers connected in series, and at least two of the amplification paths sharing at least one of the amplifiers; wherein the plurality of amplifiers includes a cross-coupled amplifier having an amplification transistor with an intrinsic gate-to-drain capacitance connected between a first input and a first output of the cross-coupled amplifier, and a cross-coupling capacitor connected between the first input and a second output of the cross-coupled amplifier, and wherein the plurality of amplifiers includes at least two amplifiers connected in series with each other in a path portion, the path portion connected in parallel with the cross-coupled amplifier.