Full wave rectifier envelope detector

Abstract From the Canadian patent

A detector is described for fully rectifying a low level A.C. input signal without developing switching transients or substantial levels of undesirable signal components. The output of the detector is substantially equal to the square root of the sum of the square of the input signal and the square of a bias component. To remove the bias component, a linearity enhancer is described which receives the output of the detector and develops a further output substantially equal to the square root of the square of the A.C. input signal. The linearity enhancer may also be employed without the detector to remove undesired component from a signal which can be represented as the square root of a …