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:
Nov. 15, 2011
Filed:
Aug. 24, 2007
Shantanu Chakrabartty, Williamston, MI (US);
Nizar Lajnef, Okemos, MI (US);
Niell G. Elvin, East Lansing, MI (US);
Amit S. Gore, East Lansing, MI (US);
Shantanu Chakrabartty, Williamston, MI (US);
Nizar Lajnef, Okemos, MI (US);
Niell G. Elvin, East Lansing, MI (US);
Amit S. Gore, East Lansing, MI (US);
Board of Trustees of Michigan State University, East Lansing, MI (US);
Abstract
A self-powered sensor is provided for fatigue monitoring and other low power requirement applications. The self-powered sensor is comprised of: a piezoelectric transducer; a non-volatile memory comprised of at least one floating gate transistor; and a current reference circuit adapted to receive a voltage signal from the piezoelectric transducer and operable to output an injection current into the non-volatile memory. The current reference circuit may employ a floating gate transistor operating in a weak-inversion mode.