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. 04, 2018
Filed:
Apr. 07, 2016
Freescale Semiconductor Inc., Austin, TX (US);
Paige M. Holm, Phoenix, AZ (US);
Lianjun Liu, Chandler, AZ (US);
NXP USA, Inc., Austin, TX (US);
Abstract
A magnetic field sensor for sensing an external magnetic field along a sensing direction oriented perpendicular to a plane of the magnetic field sensor comprises a sensor bridge. The sensor bridge has a first sensor leg that includes a first magnetoresistive sense element and a second sensor leg that includes a second magnetoresistive sense element. The first and second sense elements include respective first and second pinned layers having corresponding first and second reference magnetizations within the plane and oriented in the same direction. The first and second sense elements further include respective first and second sense layers, each having an indeterminate magnetization state. A permanent magnet layer is proximate the magnetoresistive sense elements. In the absence of an external magnetic field, the permanent magnet layer magnetically biases the indeterminate magnetization state of each sense layer to produce a sense magnetization of the first and second sense layers.