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:
Jul. 29, 2014
Filed:
Aug. 21, 2012
Saravanan Murugesan, Bangalore, IN;
Paul Walsh, Blackrock, IE;
Gerard Baldwin, Cork, IE;
Kaveh Hosseini, Rochestown, IE;
Saravanan Murugesan, Bangalore, IN;
Paul Walsh, Blackrock, IE;
Gerard Baldwin, Cork, IE;
Kaveh Hosseini, Rochestown, IE;
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
Embodiments of a capacitance sensing system including an integrating amplifier and methods for operating the same to provide a higher slew rate and bandwidth are described. In one embodiment, the integrating amplifier comprises an input stage including an inverting input coupled to an electrode of a capacitor to sense a capacitance and a non-inverting input coupled to a reference potential, and an output stage including a compensating capacitor coupled to an output. The compensating capacitor comprises two smaller capacitors coupled in parallel and a switching element configured to open when the integrating amplifier is operated in a RESET mode decoupling one of the two smaller capacitors from the output to decrease capacitance of the compensating capacitor.