Oscillation frequency measuring system and method for a MEMS sensor
US9725308B2 · kind B2 · utility
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5References
20Claims
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Key dates
| Filing date | Jun 12, 2014 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Jun 7, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB81C2203/075
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A MEMS sensor has at least a movable element designed to oscillate at an oscillation frequency, and an integrated measuring system coupled to the movable element to provide a measure of the oscillation frequency. The measuring system has a light source to emit a light beam towards the movable element and a light detector to receive the light beam reflected back from the movable element, including a semiconductor photodiode array. In particular, the light detector is an integrated photomultiplier having an array of single photon avalanche diodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.