About 22 results
https://drivepatents.com/patents/983504 · 9 Oct 2013
This document discusses, among other things, apparatus and methods for a front-end charge amplifier. In certain examples, a front-end charge amplifier for a microelectromechanical system (MEMS) device can include a charge amplifier configured to couple to ...
https://drivepatents.com/patents/983497 · 9 Oct 2013
An apparatus includes a MEMS gyroscope sensor including a first sensing capacitor and a second sensing capacitor and an IC. The IC includes a switch circuit configured to electrically decouple the first sensing capacitor from a first input of the IC and el...
https://drivepatents.com/patents/988648 · 17 Jul 2013
A method for compensating for bias of a gyroscope. In one embodiment, bias measurements for a plurality of drive angles are generated using the gyroscope. A set of equations for the bias of the gyroscope is identified using a model for motion of the gyrosc...
https://drivepatents.com/patents/994040 · 9 Jan 2013
The device has a capacitive resonator whose quality factor measuring circuit performs a measurement of a quality factor during a cut-off phase (PB) of a servo-loop. The quality factor measuring circuit comprises a sequencing circuit to limit duration of th...
https://drivepatents.com/patents/996239 · 7 Nov 2012
According to one aspect, there is provided a method for compensating for gyroscope bias on a portable electronic device having a gyroscope, an accelerometer and a magnetometer. The method includes determining a first attitude matrix and a second attitude m...
https://drivepatents.com/patents/996240 · 7 Nov 2012
According to one aspect, a method of determining an attitude matrix on a portable electronic device. The method includes determining a first attitude matrix gradient using data from at least one of an accelerometer and a magnetometer, determining a second ...
https://drivepatents.com/patents/996410 · 31 Oct 2012
A method for calibrating a micro-electro-mechanical system (MEMS) vibrating structure gyroscope is provided. The method includes obtaining an indication of a position of at least one proof mass with respect to at least one drive electrode and applying an e...
https://drivepatents.com/patents/999042 · 29 Aug 2012
An electronic device includes a frequency variable circuit 15, a filter 16, and an output voltage decision circuit 17. The frequency variable circuit 15 changes the sampling frequency of an analog-digital converter 13. The filter 16 limits the pass band of...
https://drivepatents.com/patents/1001013 · 27 Jun 2012
An angular velocity sensor includes a vibration body having a sensor electrode, a driving electrode, and a monitor electrode. The monitor electrode generates a signal according to vibration of the vibration body. The sensor circuit outputs a signal represe...
https://drivepatents.com/patents/1002167 · 23 May 2012
An inertial sensor includes an oscillator, a drive unit for oscillating the oscillator, a sensor for sensing the amount of inertia applied to the oscillator from an external source, and a failure diagnosis unit disposed between the oscillator and the drive...