Power measurement circuit

Abstract

A power measurement circuit, suitable for use in communications devices, is provided in which first and second signals derived from the signal of interest are passed through a multiplier, and the output of the multiplier is passed through a filter. In one embodiment, the filter provides a signal substantially representative of or relating to the DC component of the signal output from the multiplier. In another embodiment, the filter provides a signal substantially representative of or relating to the average power of the signal of interest. Advantageously, in one embodiment, the signal output from the filter bears a substantially linear relationship to the average power of the signal of interest over a desired region of operation. In a second embodiment, the signal output from the filter is advantageously substantially frequency invariant over a desired region of operation.

Dependencies are inferred from the claim text.