Plural phase locked loop frequency synthesizer

Details Plural phase locked loop frequency synthesizer Plural phase locked loop frequency synthesizer

1978-12-08

1980-09-30

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 25, H03B 304

Patent

active

042258308

ABSTRACT:
A frequency synthesizer with multiple phase control loops offers the facility of a wide range of frequency adjustment without any discontinuity effects either in frequency or amplitude, and includes at least three phase-controlled oscillators, the first effecting the generation of the smaller steps, the second that of the large steps and the third adding algebraically the frequencies of the two first. On a positive increment of the output frequency, the frequency of the first oscillator (0.sub.1) increases and then decreases, and so on, in two successive perfectly linked modes of operation. The synthesizer may be applied to the construction of a programmable wobbulator.

REFERENCES:
patent: 3268831 (1966-08-01), Noordanus et al.
patent: 3319178 (1967-05-01), Broadhead, Jr.

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