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:
May. 24, 2011
Filed:
Jul. 22, 2009
Dejan Mijuskovic, Chandler, AZ (US);
Liviu Chiaburu, Chandler, AZ (US);
Dejan Mijuskovic, Chandler, AZ (US);
Liviu Chiaburu, Chandler, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
Embodiments of capacitive sensors () and methods for reducing noise in capacitive sensors are provided. Embodiments of capacitive sensors include a gain stage (), a capacitive sensor output, and an active filtered-sampling stage (). The an active filtered-sampling stage includes a first resistive element () coupled to the gain stage output, a second resistive element () coupled to the capacitive sensor output, a node () between the first and second resistive elements, and a switch () selectively coupling the first node to an integrator circuit (), where the integrator circuit is coupled to the capacitive sensor output.