A cascade phase-sensitive detector: II — Phase filter synthesis

For pt.I see ibid., no.1, p.3-6 (March 1980). A synthesis procedure of the phase filter is described. The procedure consists of the Fourier-series approximation= of the specified transfer function and the mechanization of each term in the series by means of the cascadable phase-sensitive detectors (CPSDs). The prototype filter implemented by four-stage CPSD confirms the procedure. The effect of input noise on the transfer function is analyzed to show that the signal-to-noise power ratio higher than 7.7 dB is necessary for the satisfactory operation of the fifth-order filter.