Application of the phaselock loop to frequency synthesis

Details Application of the phaselock loop to frequency synthesis Application of the phaselock loop to frequency synthesis

1985-03-06

1986-12-02

Heyman, John S.

Oscillators

Relaxation oscillators

331 2, 331 22, 331 39, H03L 718, H03L 722

Patent

active

046267875

ABSTRACT:
A frequency synthesizer is disclosed having n identical digital module stages, each of which stages generates one digit of the final frequency number of the synthesized frequency output signal. Each digit module stage comprises a series arrangement of a phase lock loop, a digit adder, and a digit shifter. The present invention provides a synthesized frequency generator with components that are inexpensive and readily available commercially, and moreover the frequency synthesizer is digitally controllable such that it is compatible with other digital control circuits.

REFERENCES:
patent: 2829255 (1958-04-01), Bolie
patent: 3202930 (1965-08-01), Muraszko
patent: 3227963 (1966-01-01), Dimmick
patent: 3235815 (1966-02-01), Keicher
patent: 3300731 (1967-01-01), Noyes
patent: 3331035 (1967-07-01), Strickholm
patent: 3372347 (1968-03-01), Jones et al.
patent: 3600699 (1971-08-01), Urenberg
patent: 3838355 (1974-09-01), Papaieck
patent: 4395683 (1983-07-01), Connell et al.

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