Apparatus for deriving clock pulses from return-to-zero data pul

Details Apparatus for deriving clock pulses from return-to-zero data pul Apparatus for deriving clock pulses from return-to-zero data pul

1979-10-12

1982-03-23

LaRoche, Eugene R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307262, 307511, 328 63, 328133, 375120, H03L 706

Patent

active

043214835

ABSTRACT:
A phase-locked loop apparatus for deriving clock pulses from return-to-zero data pulses is disclosed. It includes a phase detector for computing the difference, in time, between that portion of a detected data pulse which occurs before a clock pulse edge and the portion after the clock pulse edge. The difference, once computed, is held for a long period thereafter and is used to drive a voltage controlled oscillator. The voltage controlled oscillator generates the clock pulses which are applied to the phase detector and which comprise the output of the apparatus.

REFERENCES:
patent: 3710140 (1973-01-01), Volmerange
patent: 4129748 (1978-12-01), Saylor
patent: 4222013 (1980-09-01), Bowers et al.

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