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:
Jan. 17, 2012
Filed:
Apr. 09, 2009
David E. Bien, Glendale, AZ (US);
Dejan Mijuskovic, Chandler, AZ (US);
David E. Bien, Glendale, AZ (US);
Dejan Mijuskovic, Chandler, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A device () includes a sensing element () having drive nodes () and sense nodes (). Parasitic capacitance () is present between drive node () and sense node (). Likewise, parasitic capacitance () is present between drive node () and sense node (). When a drive signal () is applied between drive nodes (), a parasitic current () between drive and sense nodes () and a parasitic current () between drive and sense nodes () is created due to the parasitic capacitances (). A capacitive network () is coupled between the drive node () and the sense node () to create a correction current () through capacitive network () that cancels parasitic current (). Likewise, a capacitive network () is coupled between the drive node () and the sense node () to create a correction current () through capacitive network () that cancels parasitic current ().