Systems and methods to reduce quadrature error in sensors
US9484890B1 · kind B1 · utility
5Cited by
0References
20Claims
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Key dates
| Filing date | Sep 5, 2013 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Jul 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/5726
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various embodiments of the invention provide for improved performance by reducing a quadrature error signal. In certain embodiments, this is accomplished by using a mixed-signal architecture comprising analog and digital circuit components in a closed-loop configuration that generates from a detected quadrature error signal a calibration quadrature signal that is then compensated at a virtual ground of an analog front end circuit. Some embodiments allow for pre-calibration for quadrature error and/or adaptive compensation of unwanted drift effects of the quadrature error, including temperature drifts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.