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, 2008
Filed:
Nov. 29, 2006
Gerhard Mitteregger, Taufkirchen, DE;
Christian Ebner, Munich, DE;
Gerhard Mitteregger, Taufkirchen, DE;
Christian Ebner, Munich, DE;
National Semiconductor Germany AG, Unterhaching, DE;
Abstract
The invention relates to a continuous-time delta-sigma analog digital converter () for converting an analog input signal (IN) to a digital output signal (OUT), comprising an analog filter (), which filters the analog input signal, a quantifier () cycled by a clock signal (CLK), which quantifier quantifies the filtered analog signal transmitted by the analog filter () to generate the digital output signal, and a feedback device () with at last one digital analog converter, which transmits at least one analog feedback signal based on the digital output signal (OUT) to the analog filter (). To simplify the feedback without adversely affecting the converter stability and power consumption, provision is made, according to the invention, for the feedback device () for generating a feedback signal corresponding to the differentiated output signal of the quantifier, to comprise two digital analog converters (--) to which the digital output signal (OUT) of the quantifier () is transmitted via a delay stage (--) with different delays, and hose analog output signals are transmitted to an analog subtractor (-).