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. 26, 2004
Filed:
Apr. 05, 2000
Applicant:
Inventors:
Yi-Qun Li, Orinda, CA (US);
Robert C. O'Handley, Andover, MA (US);
Gerald F. Dionne, Winchester, MA (US);
Chun Zhang, Warren, NJ (US);
Assignee:
Spinix Corporation, Moraga, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01R 3/300 ;
U.S. Cl.
CPC ...
G01R 3/300 ;
Abstract
Passive solid-state magnetic sensors comprise a magnetostrictive material in contact with a piezoelectric material. The magnetostrictive material strains under the influence of an external magnetic field and imparts stress to the piezoelectric material to produce a detectable voltage signal indicative of the external field. Sensors have applications in rotor speed detection, electrical current measurements, magnetic imaging, magnetic field detection, read heads, and MRAM, for example.