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:
Aug. 28, 2012
Filed:
Mar. 11, 2009
David D. Wright, Grantham, NH (US);
David D. Wright, Grantham, NH (US);
Par Technologies, LLC, Washington, DC (US);
Abstract
Circuits () are provided for applying electrical charge collected from a piezoelectric device () to a charge storage device (). The circuits comprise a peak detector () and a switch(es) () which is/are operated to initiate transfer of the electrical charge from the piezoelectric device to the charge storage device upon detection by the peak detector () of a peak voltage across the piezoelectric device (). In an example embodiment, the peak detector () comprises a peak-detection capacitance (C); a gain element (); and a non-linear PN junction circuit (). The circuits can also comprise charge multiplier circuit () configured to continue application of the electrical charge to the charge storage device () after the switch () has been turned off and/or after a point in time when magnitude of the voltage across the charge storage device () equals the magnitude of the voltage across the piezoelectric device ().