Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Reexamination Certificate
2007-12-11
2007-12-11
Kwok, Helen (Department: 2856)
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
C073S514090, C073S514330
Reexamination Certificate
active
11146993
ABSTRACT:
A thermal accelerometer device that provides a compensation for sensitivity variations over temperature. The thermal accelerometer includes signal conditioning circuitry operative to receive analog signals representing a differential temperature is indicative of a sensed acceleration. The signal conditioning circuitry includes serially connected A-to-D and D-to-A converters, which implement a temperature dependent function and process the received signals to provide a compensation for sensitivity variations over a range of ambient temperature. To provide a ratiometric compensation for variations in power supply voltage, a buffered voltage proportional to the supply voltage is provided as a reference voltage to the D-to-A converter. The thermal accelerometer includes a self-test circuit for verifying the integrity of a heater, temperature sensors, and circuitry included within the device.
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patent: 6182509 (2001-02-01), Leung
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patent: 7069785 (2006-07-01), Chou
Cai Yongyao
Dribinsky Alexander
Leung Albert
Pucci Gregory P.
Rebeschini Michael E.
Kwok Helen
Memsic Inc.
Weingarten Schurgin, Gagnebin & Lebovici LLP
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