Patent ID: 6999735

Claim:
A digital high frequency peak detection module comprises: peak detecting circuit operably coupled to detect a peak value of a high frequency signal, wherein the peak detecting circuit includes: an amplifier having a first input, a second input, and an output, wherein the first input is operably coupled to receive the high frequency signal and wherein the amplifier includes: first input transistor having a gate, a drain, and a source, wherein the gate of the first input transistor is operably coupled to receive the high frequency signal; first biasing transistor having a gate, a drain, and a source, wherein the drain of the first biasing transistor is coupled to the drain of the first input transistor to provide the output of the amplifier; second input transistor having a gate, a drain, and a source, wherein the gate of the second input transistor is operably coupled to receive the peak value of the high frequency signal; second biasing transistor having a gate, a drain, and a source, wherein the drain of the second biasing transistor is coupled to the drain of the second input transistor, wherein the gates of the first and second biasing transistors are coupled together and to the drain of the second input transistor, and wherein the sources of the first and second biasing transistors are coupled to the supply voltage; and current source operably coupled to the sources of the first and second input transistors and to the reference potential; transistor having a gate, a drain, and a source, wherein the gate is coupled to the output of the amplifier, the source is coupled to a supply voltage, and the drain is coupled to the second input of the amplifier, wherein coupling of the transistor provides positive feedback to the amplifier; capacitor operably coupled to the drain of the transistor and to a reference potential, wherein a voltage imposed on the capacitor represents the peak value of the high frequency signal; and peak computing circuit operably coupled to generate a digital peak value from the peak value.