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. 23, 2000
Filed:
May. 04, 1998
Applicant:
Inventors:
Manfred Mauthe, Grosshelfendorf, DE;
Jens Sauerbrey, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341143 ; 341144 ;
Abstract
A digital-analog converter having high linearity is based on two sigma-delta modulators of second order which are fed back in a cascaded fashion and via differentiators. The first modulator has a quantizer with only three stages, an output signal of which delivers an analog output signal via a three-stage digital-analog converter and a low-pass filter. The particularly high linearity, the good stability and the relatively large bandwidth with reference to clock frequency are advantages of the digital-analog converter.