Patent ID: 7167692
Filing Date: 2007-01-23
Classification: G01R,H03G,H04W

Abstract:
1. A high frequency peak detector comprises: an operational amplifier having a first inverting input, a second inverting input, a non-inverting input and an output, wherein the first inverting input is operably coupled to receive a high frequency input signal, the second inverting input is operably coupled to receive a common mode voltage of the high frequency signal, and wherein the non-inverting input is operably coupled to the output of the operational amplifier; a transistor having a gate, a drain, and a source, wherein the gate of the transistor is operably coupled to the output of the operational amplifier and the source of the transistor is operably coupled to a power supply; a capacitor having a first plate and a second plate, wherein the first plate of the capacitor is operably coupled to the drain of the transistor to provide an analog signal representing an average peak to common mode value of the high frequency signal and the second plate of the capacitor is operably coupled to a circuit ground; and an average to peak conversion module operably coupled to determine a peak value of the high frequency signal based on the analog signal and the common mode value.