Detection of true rms a transistor bridge circuit below the threshold

摘要

A detector circuit configured to perform all the method steps according to claim 8, the detector circuit a bridge circuit (100, 200, 300) of transistors comprising below the threshold, comprising each of the four branches of the bridge circuit one transistor configured to operate in a region below the threshold over a predetermined level input signal, so that an RF signal input applied to a first pair of corners facing the bridge circuit produces an output signal of the bridge interval in the remaining pair of opposing corners, having the output signal of the bridge one low frequency component substantially proportional to the square of the amplitude of the envelope of the RF signal input.