High performance dual mode multiple source/local oscillator modu

Details High performance dual mode multiple source/local oscillator modu High performance dual mode multiple source/local oscillator modu

1999-09-02

2000-12-19

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 14, 331 18, 331 25, 331 56, 331 74, 331 77, H03L 707, H03L 722

Patent

active

061632236

ABSTRACT:
A dual-mode multiple signal source/local oscillator module is capable of operating in either an independent offset mode or a common offset mode. The module includes first and second coarse frequency sources, a first signal generator coupled to the first coarse frequency source, a second signal generator, and an offset switch coupled to the second signal generator. The offset switch connects the second signal generator to either the first coarse frequency source in the common offset mode, or the second coarse frequency source in the independent offset mode. Operation of the sources in the common offset mode provides the benefits of dynamic tracking which include reduction of receiver IF phase noise and spurious signal content, improved receiver IF settling speed, and higher measurement accuracy.

REFERENCES:
patent: 5270669 (1993-12-01), Jokura
patent: 5572167 (1996-11-01), Alder et al.
patent: 5610558 (1997-03-01), M ittel et al.

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