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:
Apr. 16, 2019
Filed:
Feb. 06, 2017
Nxp Usa, Inc., Austin, TX (US);
Paige M. Holm, Phoenix, AZ (US);
Mark Edward Schlarmann, Chandler, AZ (US);
NXP USA, Inc., Austin, TX (US);
Abstract
A pressure sensor includes a diaphragm suspended across a cavity in a substrate. A first group of piezoresistors is provided in the diaphragm, the piezoresistors of the first group being coupled to one another to form a first Wheatstone bridge having first positive and negative output nodes. A second group of piezoresistors is provided in the diaphragm, the piezoresistors of the second group being coupled to one another to form a second Wheatstone bridge having second positive and negative output nodes. The first negative output node of the first Wheatstone bridge is electrically connected to the second positive output node of the second Wheatstone bridge to directly chain the outputs of the Wheatstone bridges. The first and second Wheatstone bridges each produce an output signal as a function of an external pressure stimulus that is combined via the chained arrangement of the Wheatstone bridges to produce a composite output signal.