Patent ID: 7504888

Claim:
A circuit for providing a zero, comprising: a differential amplifier, including: a preamplifier circuit, having at least a first input, a second input, a first output, and a second output, wherein the preamplifier includes: a first transistor that is coupled between a first transistor node and the first output of the preamplifier circuit, and that is further coupled to the first input of the preamplifier circuit; a second transistor that is coupled between a second transistor node and the second output of the preamplifier circuit, and that is further coupled to the second input of the preamplifier circuit; and a capacitor that is coupled between the first transistor node and the second transistor node; and a gain circuit comprising: a differential-to-single-ended circuit that is arranged to provide a single-ended signal based, at least in part, on a value at the first output of the preamplifier circuit and a value at the second output of the preamplifier circuit; and a gain amplifier circuit that is arranged to provide an amplified signal based, at least in part, on a value on the single-ended signal, and a gain factor.