Phase selective diode gate circuit

Abstract

Abstract 867,430. Phase-sensitive circuits. BENDIX CORPORATION. Jan. 28, 1959 [Feb. 4, 1958], No. 3088/59. Class 38 (4) In order to eliminate from an A.C. signal unwanted quadrature components the signal is gated by a reference signal so that only the peaks of the desired component are passed. Current between the A.C. signal input 23 and the output 37 is gated by diodes 31, 33 which are rendered non-conducting by bias from the unsmoothed output of a full-wave rectifier 9, 11 supplied by the reference source 1 which is in quadrature with the desired signal. A capacitor 17 is charged through a further diode 15 to provide a D.C. bias, part of which is tapped off a potential divider 19, 21 to oppose the pulsating bias so that the gating diodes 31, 33 can conduct for a short period each time the pulsating bias approaches zero, which corresponds to the maxima of the desired signal component and the minima of the quadrature component. A tuned circuit 39, 45 rejects the harmonic content of the current pulses.

Inventors

• 👤 Fennick Benjamin

Bibliographic Details