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:
Aug. 05, 2008
Filed:
Dec. 18, 2006
Gerhard Mitteregger, Taufkirchen, DE;
Gerhard Mitteregger, Taufkirchen, DE;
National Semiconductor Germany AG, Unterhaching, DE;
Abstract
A continuous-time delta-sigma analog digital converter for converting an analog input signal to a digital output signal, comprising an analog filter with at least one integration capacitor, a cycled quantifier which quantifies the filtered analog signal for generating the digital output signal, and a feedback device with at least one digital analog converter, which supplies at least a first analog feedback signal to the analog filter corresponding to the value of the digital output signal. The feedback device for generating a second feedback signal corresponding to the differentiated output signal of the quantifier, comprises a switching device coupled capacitively to the integration capacitor, by means of which device corresponding charge portions are transmitted to the integration capacitor when there is a variation in the digital output signal.