Frequency converter arrangement

Details Frequency converter arrangement Frequency converter arrangement

2006-04-04

2006-04-04

Phu, Phuong (Department: 2631)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S375000, C455S180300, C455S189100

Reexamination Certificate

active

07023948

ABSTRACT:
A frequency arrangement with at least two successive heterodyne stages, one of which converts an input signal with an adjustable first frequency of a superposition oscillator that can be set in fine frequency increments into a first intermediate frequency, a second heterodyne stage that converts an input signal with a fixed second heterodyne frequency of a second superposition oscillator into a second intermediate frequency, the difference frequency between the first and second heterodyne frequencies is converted with an adjustable frequency divider into a lower frequency, which is then compared in a phase detector to the output frequency of a reference oscillator which is implemented as a synthesizer that can be set in fine frequency increments, the first superposition oscillator being synchronized with the output frequency of the reference oscillator via a phase control loop with the output signal of this phase detector, and the adjustable frequency divider preferably being a fractional N-divider with single stage integration.

REFERENCES:
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patent: 4479257 (1984-10-01), Akiyama
patent: 4491976 (1985-01-01), Saitoh et al.
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patent: 5349310 (1994-09-01), Rieder et al.
patent: 5752174 (1998-05-01), Matai et al.
patent: 27 44 432 (1986-01-01), None
patent: 40 21 294 (1992-01-01), None
Patents Abstracts of Japan—E-323 Jun. 21, 1985 vol. 9/No. 14—60-28330—Feb. 13, 1985.
Patents Abstracts of Japan—E-494 Apr. 2, 1987 vol. 11/No. 10 61-252720—Oct. 11, 1986.

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