Adaptive phase delay adjustment for MEMS sensors
US9575089B1 · kind B1 · utility
6Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Dec 25, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/5719
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various embodiments of the invention allow to cancel demodulation phase error. In certain embodiments, cancellation is accomplished by determining the phase delay of a drive front end signal that is in phase with an undesired signal and digitally adjusting the demodulation signal with a calibrated signal. The phase delay may be adaptively compensated during regular circuit operation, only at predetermined times, or during a factory calibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.