Frequency synthesis using fractional frequency multiplication

Details Frequency synthesis using fractional frequency multiplication Frequency synthesis using fractional frequency multiplication

1990-08-13

1993-02-16

Kuntz, Curtis

Pulse or digital communications

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375119, 455260, 331 25, H04L 7033, H03D 324

Patent

active

051877228

ABSTRACT:
Frequency synthesis apparatus for providing a desired frequency which is greater than and a fractional multiple, N/M, of a reference signal frequency utilizes a fractional multiplier in the feedback path of a phase-locked loop. The fractional multiplier provides a multiplication of M/N on the feedback signal. Advantageously, this technique can be utilized in either analog or digitally-implemented phase-locked loops and can be coupled with the use of a fractional multiplier in the feedforward path of the digitally-implemented phase-locked loop to improve jitter performance.

REFERENCES:
patent: 4492936 (1985-01-01), Albarello et al.
patent: 4641323 (1987-02-01), Tsang
patent: 4688237 (1987-08-01), Brault
patent: 4847875 (1989-07-01), Choi
patent: 4949357 (1990-08-01), Sehier
patent: 5018170 (1991-05-01), Wilson
patent: 5055800 (1991-10-01), Black et al.

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