MEMS GYRO MOTOR LOOP FILTER

A motor drive loop circuit for a micro-electro-mechanical system (MEMS) gyroscope is provided. The motor drive loop circuit includes a motor configured to drive a proof mass in the MEMS gyroscope and a minus-90-degree phase-shift twin-tee notch filter. The motor is configured to cause the proof mass...

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Bibliographic Details
Main Author ACKERMAN JOHN F
Format Patent
LanguageEnglish
Published 14.01.2016
Subjects
GYROSCOPIC INSTRUMENTS
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SURVEYING
TESTING
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Summary:A motor drive loop circuit for a micro-electro-mechanical system (MEMS) gyroscope is provided. The motor drive loop circuit includes a motor configured to drive a proof mass in the MEMS gyroscope and a minus-90-degree phase-shift twin-tee notch filter. The motor is configured to cause the proof mass to oscillate at a primary-proof-mass mode. The a minus-90-degree phase-shift twin-tee notch filter is configured to: provide a minus 90 degree phase at a motor resonance frequency equal to the primary-proof-mass mode; suppress resonance at undesired mechanical modes of the motor during a startup of the motor; and provide gain at the motor resonance frequency.
Bibliography:Application Number: US201414325674