Phase selective rectifier including differential amplifier - with input and binary reference signal applied to two inputs of rectifier

摘要

The phase selective rectifier delivers at its output a phase selectively rectified output signal, whose d.c. mean value is a measure for frequency and phase coincidence of the input signal with reference signal. It comprises a differential amplifier (V), to whose inputs (E1, E2) an input signal (S1) is applied. The reference signal (S2) is applied to a switching stage (A) with two switches (A1, A2) each connected to one of the amplifier inputs. They short-circuit one of its inputs in accordance with the binary signal values.