Phase detector with 10-bit accuracy

Posted on Dec 10, 2012    10234

Signals of identical frequency are applied to sync input (Pin 6) and to the demodulator input (Pin 4), respectively, the demodulator functions as a phase detector with output dc component being proportional to phase difference between the two inputs. The signals must be referenced to 0 V for dual supply operation or to VR/2 for single supply operation. At ± 5-V supplies, the demodulator can easily handle 7-V peak-to-peak signals. The low-pass network configured with the uncommitted amplifier dc output at Pin 1 of the device.

Phase detector with 10-bit accuracy - schematic

The dc output is maximum (+ full-scale) when Vj and V2 are 180° out of phase and minimum (- full-scale) when the signals are in phase.

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