Timing recovery circuit

Details Timing recovery circuit Timing recovery circuit

1984-06-20

1987-11-03

Griffin, Robert L.

Pulse or digital communications

Spread spectrum

Direct sequence

351 1A, 307510, H03D 324

Patent

active

047047224

ABSTRACT:
Prior art circuits for recovering timing information from baseband digital signals include a rectifier and a separate phase detector for controlling the phase of a phase-locked voltage-controlled oscillator. In the circuit described herein, an antiparallel diode pair is used to perform the two functions of rectification and phase detection. The resulting timing circuit is, thereby, simplified. Alternatively, a dual-gate field effect transistor may be used.

REFERENCES:
patent: 3209261 (1965-09-01), Critchlow
patent: 3311442 (1967-03-01), Jager et al.
patent: 3493868 (1970-02-01), Hackett, Jr.
patent: 3654564 (1972-04-01), Tisi et al.
patent: 3742372 (1973-06-01), Uchida et al.
patent: 3800231 (1974-03-01), Pratt
patent: 4074207 (1978-02-01), Forsberg
patent: 4162446 (1979-07-01), Cochran
patent: 4276650 (1981-06-01), de Jager et al.
patent: 4464771 (1984-08-01), Sorensen
patent: 4527080 (1985-07-01), Zweig
patent: 4546275 (1985-10-01), Pena-Finol et al.
Floyd Gardner, "Phaselock Techniques", 1966 John Wiley Son Inc., pp. 116-119.

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