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. 22, 2013
Filed:
Nov. 09, 2007
Nandakishore Raimar, Bangalore, IN;
Timothy J. Williams, Bellevue, WA (US);
Nandakishore Raimar, Bangalore, IN;
Timothy J. Williams, Bellevue, WA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A circuit for charging a capacitive load to a reference voltage in a capacitive sensor measurement circuit includes a reference buffer, a boost buffer, and drive logic. The reference buffer and the boost buffer are coupled with the capacitive load to be charged. The boost buffer first charges the capacitive load towards the reference voltage at a first rate of charging, and then ceases charging. The reference buffer subsequently continues charging at a slower second rate to settle the voltage across the capacitive load to within a tolerable range of the reference voltage.