Lumen Laboratories, Inc.

Michael B Michalik

Robert F Dillon

A phase detector includes a mixer circuit responsive to an input signal and a reference signal to produce an error signal which is a function of the phase difference between the input signal and the reference signal; a phase shifting circuit varies the phase difference between the input and reference signals; a control circuit responsive to the error signal provides a drive signal to the phase shifting circuit to set to quadrature the phase difference between the input and reference signals; and a phase indicator device responsive to the drive signal indicates the phase difference between the component and reference signals.

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Waltham, MA, United States of America

Michael B Michalik