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:
Jan. 01, 2013
Filed:
Oct. 28, 2005
Klaas-jan DE Langen, Nijmegen, NL;
Johan Witte, Delft, NL;
Klaas-Jan De Langen, Nijmegen, NL;
Johan Witte, Delft, NL;
NXP B.V., Eindhoven, NL;
Abstract
The present invention relates to a system for measuring a capacitor (C). A current source () is connected in parallel to the capacitor (C) between a supply plane (Vc) and groundfor providing a current to the capacitor (C). A voltage level-shift is connected between the supply plane (Vc) and the groundin parallel to the capacitor (C) and in parallel to the current source (I). The voltage level-shift senses a voltage across the electronic component (C) and provides a level-shifted output voltage Vin dependence thereupon. The voltage level-shift comprises a resistor (R) connected in series with a current source (II) and an output port interposed between the resistor (RI) and the current source (II). The current sources (I,) and () have opposite temperature coefficients such that the current provided to the electronic component is substantially constant.