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:
Oct. 17, 2000
Filed:
Jun. 29, 1998
Michel Farid Sultan, Troy, MI (US);
Charles Robert Harrington, Troy, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A low cost, bi-directional airflow sensing device based on sensed temperature differential due to airflow achieves improved sensitivity and accuracy, and reduced manufacturing cost, by providing two separate pairs of upstream and downstream sensing elements on the same substrate, and connecting the sensing elements as the four legs of an on-chip Wheatstone bridge. The sensitivity is at least doubled since sensor elements are connected in each of the bridge legs, and accuracy and cost are improved through the elimination of off-chip bridge resistors. Additional improvements in the susceptibility to electromagnetic interference (EMI) are realized since the bridge is fully closed on the sensor substrate, and the bridge resistors are located in close proximity.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile