In-band beating removal for a MEMS gyroscope
US10119822B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2013 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Aug 1, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Vibration gyroscope circuitry, connectable to a vibrating MEMS gyroscope, includes drive circuitry for driving the gyroscope and a measurement circuit for providing a drive measurement signal indicating displacement of a mass along a drive axis. Sense circuitry processes a sense measurement signal of the gyroscope indicating displacement of the mass along a sense axis. A digital sample clock generator includes an oscillator for generating a master clock, a counter for counting master clock periods during one period of an input signal derived from the drive measurement signal, and a number count monitor for determining during how many input signal periods the number count stays constant and for comparing a number of constant periods with a critical number of constant periods. A frequency shifter triggers the oscillator to shift the master clock frequency whenever the monitor determines that the number of constant periods exceeds the critical number of constant periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.