Method and system for control and readout of tuning fork gyroscope
US11561094B2 · kind B2 · utility
0Cited by
9References
12Claims
0Family size
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Key dates
| Filing date | Oct 16, 2019 |
| Grant date | Jan 24, 2023 |
| Priority date | — |
| Expiry date | Jul 14, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45618
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tuning fork sensor system places a controlled bias on the proof-mass drive-axis electrodes to cancel the quadrature charge. Also, its charge amplifiers employ a field-effect transistor biased slightly into the triode region so that it behaves as a very large value resistor. In addition, it uses a phase-locked loop having a special loop filter in order to optimize performance by rejecting off-frequency drive feedthrough to the motor pick-off while resulting in very low phase wander for the demodulation references.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.