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. 26, 2009
Filed:
Mar. 28, 2008
Gilles Chamming's, Grenoble, FR;
Gilles Chamming's, Grenoble, FR;
Abstract
The present invention relates to a device for measuring an electric charge in digitized form. The digitized value is coded on N bits. The device has at least a battery of N capacitors () integrating the charge. The capacitors have a common electrode linked to a current source providing the charge. Each capacitor has an individual electrode. The values of the capacitances of the capacitors are in geometric progression. A capacitor corresponds to a bit of the digitized value. Switches () are connected to each individual electrode operating according to two phases, connecting the capacitors in parallel in an integration phase so as to integrate the charge in the capacitors () and making it possible in a digitization phase to take each of the individual electrodes to two distinct potentials, corresponding to the two logic states of the bit, so as to transfer or not transfer the charge carried by the capacitor to all the other capacitors of the battery. The device has a logic unit () making it possible to determine in the second mode the combination of capacitors which, containing the same quantity of charge, is at a defined potential, the combination representing the digitized value.