Patent ID: 7116948

Claim:
A high-speed signal power detection circuit comprises: an input coupling circuit operably couple to receive a signal and to convert the signal into a first input and a rectifying input; a rectifying operation amplifier including: first input transistor operably coupled to receive the first input; second input transistor; rectifying transistor operably coupled to receive the rectifying input; current source operably coupled to provide a reference current to the first input transistor, second input transistor and the rectifying transistor; first active input load transistor operably coupled to provide a first active load for the first input transistor and the rectifying transistor; second active input load transistor operably coupled to provide a second active load for the second transistor; active output load transistor operably coupled to mirror the reference current; and output transconductance stage operably coupled to the active output load transistor and the first input transistor, wherein the output transconductance stage provides a rectified output representing a peak value of the signal; comparator operably coupled to compare the peak value of the signal with an output peak value to produce a comparison value; and charge pump operably coupled to convert the comparison value into a corresponding current that represents the output peak value.