Method for achieving highly reproducible acceleration...

Details Method for achieving highly reproducible acceleration... Method for achieving highly reproducible acceleration...

2006-09-12

2006-09-12

Mis, David (Department: 2817)

Oscillators

With device responsive to external physical condition

C331S068000, C331S158000

Reexamination Certificate

active

07106143

ABSTRACT:
An oscillator and a method for producing an improved oscillator that will generate an accurate frequency when encountering a vibration. The oscillator and method uses a crystal with minimal cross-axis coupling. Further, a first accelerometer produced using MEMS technology is used. The first accelerometer is positioned inside of the oscillator so that the accelerometer accurately measures any vibration encountered by the oscillator. The first accelerometer and the crystal are maintained at constant temperature to minimize phase shifts and gain variations.

REFERENCES:
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patent: 6707346 (2004-03-01), Tillotson et al.
patent: 60207237 (1985-10-01), None
patent: 63119199 (1988-05-01), None
Rosati, Vincent J., Suppression of Vibration-Induced Phase Noise In Crystal Oscillators: An Update, 41stAnnual Frequency Control Symposium—1987.
Hideo Kawahara, Japanese Office Action Mailing Date Aug. 31, 2004, and English translation.

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