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:
Dec. 15, 2015
Filed:
Nov. 27, 2012
Advanced Silicon SA, Lausanne, CH;
Hussein Ballan, Saint Legier, CH;
Francois Krummenacher, Chatillens, CH;
Advanced Silicon SA, , CH;
Abstract
Electronic interface and method for reading a capacitive sensor that includes one input capacitor () or several input capacitors, in which the capacitive sensor is excited with a two-level voltage (V, V) and read by a charge-sense amplifier whose output is sampled in four successive instants. An evaluation unit () is arranged to compute two difference values (V, V) between two pairs of samples corresponding to different voltage levels and to combine said difference values into an output value (V_out_raw) proportional to the charge transferred to the input of the charge-sense amplifier and an error value (error_bit) sensitive to a time derivative of a noise current di/dt.