The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2007
Filed:
Jun. 07, 2005
Yang Zhao, Andover, MA (US);
Albert Leung, Burnaby, CA;
Michael E. Rebeschini, Hanover Park, IL (US);
Gregory P. Pucci, Batavia, IL (US);
Alexander Dribinsky, Naperville, IL (US);
Yongyao Cai, Acton, MA (US);
Yang Zhao, Andover, MA (US);
Albert Leung, Burnaby, CA;
Michael E. Rebeschini, Hanover Park, IL (US);
Gregory P. Pucci, Batavia, IL (US);
Alexander Dribinsky, Naperville, IL (US);
Yongyao Cai, Acton, MA (US);
Memsic, Inc., North Andover, MA (US);
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.