Frequency synthesizer modulation response linearization

Details Frequency synthesizer modulation response linearization Frequency synthesizer modulation response linearization

1985-03-29

1987-03-10

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Transistorized controls

331 16, 331 17, 331 25, H03L 718

Patent

active

046493530

ABSTRACT:
In accordance with the present invention, there is provided a method of substantially flattening the modulation response in a frequency synthesizer. The method includes the steps of generating a synthesized frequency in response to a filtered control signal; scaling the synthesized frequency with a scalar; generating a control signal, having a response substantially the reciprocal of the frequency generation response, and indicative of the phase relationship between a reference frequency and the scaled, synthesized frequency; and filtering the control signal, whereby the interaction of the phase relationship control signal response and the frequency generation response approximates a flat modulation response.

REFERENCES:
patent: 3579281 (1971-05-01), Kam et al.
patent: 3694776 (1972-09-01), Linder
patent: 4151473 (1979-04-01), Coleman et al.
patent: 4156855 (1979-05-01), Crowley
patent: 4167711 (1979-09-01), Smoot
patent: 4243941 (1981-01-01), Zdunek
patent: 4310804 (1982-01-01), Ryon
patent: 4330758 (1982-05-01), Swisher et al.
patent: 4392113 (1983-07-01), Jackson
patent: 4442412 (1984-04-01), Smith et al.
"Phase-Frequency Detector MC4344.MC4044" Motorola Inc., 1972.

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