Trim circuit and method of oscillator drive circuit phase calibration

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12203774
APP PUB NO 20220326044A1
SERIAL NO

17654057

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An oscillator drive circuit and a trim circuit are implemented inside an integrated circuit of a sensor. The drive circuit provides an oscillating drive signal at a resonant frequency to drive a movable mass of the sensor. The drive circuit includes a phase shift circuit having an input for receiving a first signal indicative of an oscillation of the movable mass and having an output. The phase shift circuit adds a phase shift component to the first signal and produces a second signal shifted in phase by the phase shift component. The trim circuit includes a first comparator for receiving the first signal, a second comparator for receiving the second signal, and a processing element. The processing element determines a phase lag between the first and second signals and produces trim code for use by the phase shift circuit, the trim code being configured to adjust the phase shift component.

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Patent Owner(s)

  • NXP USA, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jo, Sung Jin Gilbert, US 18 151
Kraver, Keith L Gilbert, US 15 238
Sridhar, Raghavendra N Queen Creek, US 5 14
Trauth, Gerhard Muret, FR 16 66

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