Frequency synthesizer for synthesizing signals of a variety of f

Details Frequency synthesizer for synthesizing signals of a variety of f Frequency synthesizer for synthesizing signals of a variety of f

1995-03-14

1996-09-24

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With stable heterodyne oscillator or source

331 38, 332103, 375279, 375308, H03L 718, H04L 2720

Patent

active

055594751

ABSTRACT:
A frequency synthesizer in which a PLL synthesizer 50 generates signals of frequency steps of an integer times a target frequency step. A base band generator 2 digitally generates sine wave signal components of the target frequency step. The outputs from the PLL synthesizer 50 and the base band generator 2 are cross-modulated by use of a quadrature modulator 1 to change the frequency of the output signals with a change step of the base band generator 2.

REFERENCES:
patent: 4339826 (1982-07-01), Ogita et al.
patent: 4558282 (1985-12-01), Lowenschuss
patent: 4654597 (1987-03-01), Hino
patent: 5412351 (1995-05-01), Nystrom et al.
patent: 5451910 (1995-09-01), Guthrie
"Application Technique of PLL", Electronic Circuit Know-How Series, Nippon Hoso Shuppan Kyokai, pp. 59-60, Jan. 20, 1988.

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