Frequency and phase comparator

Details Frequency and phase comparator Frequency and phase comparator

1979-01-04

1981-04-28

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307526, 30516, 328110, A03K 526

Patent

active

042648661

ABSTRACT:
First and second triggered D type flip flops activated by input signal pulses and input reference pulses control first and second pulse generating circuits, a set/reset latch, and a clock input of a third edge triggered D type flip flop. A three input exclusive-or gate connected to the first and second edge triggered D type flip flop and to the set/reset latch is active on the data input of the third edge triggered D type flip flop for producing a sign signal of difference frequency. First and second gating circuits and an adding circuit are controlled by the sign signal for producing output pulses of difference frequency. First, second, third, and forth edge triggered pulse generating circuits activated by the first and second edge triggered D type flip flops and the set/reset latch produce pulses, which are distributed by an electronic combinational switch to operate first and second combinational set/reset latches for producing output two phase pulses of difference frequency.

REFERENCES:
patent: 3576497 (1971-04-01), Miller
patent: 3610982 (1971-10-01), Rall
patent: 4135161 (1979-01-01), Torrieri

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