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:
Dec. 13, 1988
Filed:
Jul. 16, 1987
Applicant:
Inventors:
Soenke Mehrgardt, March, DE;
Ulrich Theus, Gundelfingen, DE;
Assignee:
Deutsche ITT Industries GmbH, Freiburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341144 ; 323317 ;
Abstract
A monolithic integrated digital-to-analog converter makes use of rotating current-source control (dynamic element matching). After the conversion of a digital input signal into a code containing a sequence of first binary conditions corresponding to the numerical value of the input signal (so-called thermometer code), the bit switches of possibly same-sized current sources are rotatingly controlled in the sense of being selected, so that it becomes possible in the manufacture of the monolithic integrated digital-to-analog converters to balance out the manufacturing tolerances or process variations of the current sources.