Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular frequency control means
Patent
1997-02-24
1998-07-21
Nguyen, Tan T.
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular frequency control means
331116M, 331156, 331176, H03L 700
Patent
active
057839735
ABSTRACT:
Micromachined, thermally insensitive silicon resonators are provided having accuracy equivalent or superior to that of quartz resonators, and are fabricated from a micromechanical, silicon-on-glass process. In one embodiment, such a resonator is realized using a tuning fork gyroscope. Radiation-hard precision voltage references (PVRs) are enabled using the silicon resonators. Thermal sensitivity is reduced relative to that of a silicon-on-silicon process oscillator, providing a thermal sensitivity comparable to that of a quartz oscillator. By employing a micromechanical device based upon a tuning fork gyroscope, resonators are made from either or both of the gyro drive and sense axes. A resonator constructed as an oscillator loop whose resonant frequency is compared to a frequency standard provides a bias voltage as a reference voltage.
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Kourepenis Anthony S.
Ward Paul A.
Weinberg Marc S.
Nguyen Tan T.
The Charles Stark Draper Laboratory Inc.
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