Patent ID: 7049856

Claim:
A peak amplitude comparator comprising: a first transistor having a control terminal coupled to receive an input signal, a first terminal coupled to a power supply, and a second terminal coupled to apply a first signal; a capacitor coupled to the second terminal of the first transistor and for maintaining the first signal; a second transistor having a control terminal coupled to receive a reference voltage, a first terminal coupled to the power supply, and a second terminal coupled to apply a second signal; a comparator having a first terminal coupled to receive the first signal and a second terminal coupled to receive the second signal, wherein the input signal comprises a first part of a differential input signal; and a third transistor having a gate terminal coupled to receive a second part of the differential input signal, a first terminal coupled to the power supply, and a second terminal coupled to the capacitor that is also coupled to the second terminal of the first transistor.