Phase coincidence detector

Details Phase coincidence detector Phase coincidence detector

1987-05-22

1988-06-14

Laroche, Eugene R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307510, 328110, H03K 908

Patent

active

047514698

ABSTRACT:
This invention relates to a phase coincidence detector for examining whether or not two input digital signals are coincident by utilizing a delay signal and an advance signal of a digital phase comparator which examines the phase difference between the two input digital signals and outputs the delay signal representing the delay of one of the input signals to the other and the advance signal representing the advance of one of the input signals to the other. Particularly, the output signals of the phase comparator, that is, the delay signal and the advance signal, are periodic pulse signals, and residual pulses having a small pulse width occur periodically even at the time of coincidence. The phase coincidence detector of this invention changes the delay and advance signals by a pulse width discrimination circuit for discriminating whether or not the phase difference between the two input signals is below a certain constant value, and samples the changed signals to output the in-phase and out-of-phase state as signals having different levels.

REFERENCES:
patent: 3610954 (1971-10-01), Treadway
patent: 4122405 (1978-10-01), Tietz et al.
patent: 4354124 (1982-10-01), Shima et al.

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