US4318063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal oscillator compensated for g-sensitivity
Assignee: United States Department of the Air Force
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Filing: 1979-05-03
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Granted: 1982-03-02
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Expires: 1999-05-03
Abstract
Abstract A crystal reference oscillator with improved g-sensitivity is realized through the use of an appropriately oriented single axis accelerometer. Components of acceleration normal to the plane of zero g-sensitivity of the oscillator are sensed by the accelerometer which returns a correction voltage to the electronic frequency control input of the oscillator. A model is developed that permits determination of accelerometer position relative to the oscillator without prior knowledge of crystal orientation.
Inventors
- 👤 Joseph M. Przyjemski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:50
CPC Classifications
H; H03; H03L; H03L1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
The method of fabricating a g-sensitivity compensated crystal oscillator comprising the steps of providing a crystal oscillator having electronic frequency control, determining the plane of zero g-sensitivity of said crystal oscillator, providing a single axis accelerometer having an output means affixing said accelerometer to said crystal oscillator in a physical orientation relative thereto that is effective to detect components of acceleration normal to said plane of zero g-sensitivity and whereby said accelerometer will generate frequency correction voltage output signals in response to said components of acceleration, and p1 connecting said accelerometer output to said electronic frequency control.
Claim 2
Independent Claim
97 words
The method of fabricating a g-sensitivity compensated crystal oscillator comprising the steps of providing a crystal oscillator having electronic frequency control, determining the plane of zero g-sensitivity of said crystal oscillator, providing a single axis accelerometer having an output means affixing said accelerometer to said crystal oscillator in a physical orientation relative thereto that is effective to detect components of acceleration normal to said plane of zero g-sensitivity and whereby said accelerometer will generate frequency correction voltage output signals in response to said components of acceleration, and p1 connecting said accelerometer output to said electronic frequency control.
References Cited (Backward Citations)
US4100512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |