High stability double oven crystal oscillator

Details High stability double oven crystal oscillator High stability double oven crystal oscillator

2007-12-18

2007-12-18

Chang, Joseph (Department: 2817)

Oscillators

With outer casing or housing

With temperature modifier

C331S176000, C331S158000

Reexamination Certificate

active

11362649

ABSTRACT:
A double oven crystal oscillator (DOCXO) is disclosed which is highly stable by incorporating means to reduce the effects of ambient pressure changes on the frequency of the oscillator. The oscillator crystal is mounted in a temperature controlled inner oven to reduce the effects on the frequency stability of the oscillator. The oscillator circuitry and all circuitry associated with the inner oven is mounted in good thermal contact with the inner oven. A Faraday shield at ground potential is placed over the oscillator circuitry to minimize the effects of stray capacitance between the oscillator components and the case wall of the inner oven. The effects of minor deformations in the case walls within the oscillator caused by ambient pressure changes and other factors causing pressure changes are thereby greatly minimized. To further reduce effects on oscillator frequency stability the ovens of the DOCXO are temperature controlled, cases are hermetically sealed, the case walls are rigid, and ovens and cases may be evacuated.

REFERENCES:
patent: 5719782 (1998-02-01), Mitsuoka
patent: 6166608 (2000-12-01), Merriss et al.
patent: 6236282 (2001-05-01), Ballantyne et al.
patent: 6621361 (2003-09-01), Fry
patent: 6731180 (2004-05-01), Clark et al.
patent: 6784756 (2004-08-01), Villella
patent: 6859110 (2005-02-01), Satoh
patent: 7015762 (2006-03-01), Nicholls et al.
patent: 7173499 (2007-02-01), Satoh

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