Dr Chinwuba Ezekwe
Bosch Sensortec, Palo Alto
BSAC PhD 2007
October 20, 2015 | 12:00 to 01:00 | 540 Cory Hall
Host: Bernhard Boser
Consumer electronic (CE) gyroscopes have recently enjoyed broad deployment in high volume applications, largely due to intuitive user interfaces in smart phones and video game controllers. For their continued expansion into more demanding CE applications, a further reduction of their noise, offset drift, and power dissipation, especially in the emerging always-on category, is mandatory. To be viable, solutions to these conflicting requirements must overcome the challenges of low cost and ever shrinking package size. This talk covers one of Bosch's answers to this challenge, with special emphasis on offset drift reduction. This solution discards the standard practice of electrically cancelling the quadrature error, and instead combines information derived from continuously monitoring the quadrature error together with a single point temperature calibration to reduce offset drift.
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