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:
Mar. 03, 2015
Filed:
Aug. 07, 2012
Dirk Duesterberg, Emmerthal, DE;
Holger Borcherding, Hessisch Oldendorf, DE;
Dirk Duesterberg, Emmerthal, DE;
Holger Borcherding, Hessisch Oldendorf, DE;
Lenze Automation GmbH, Aerzen, DE;
Abstract
A method is provided for generating a digital signal (DS) from an analog signal (IA, UA) generated by a frequency converter on the basis of pulse width modulation, wherein the digital signal corresponds to a mean value of the analog signal over a period of the pulse width modulation. The method includes the acts of: generating a bit stream (BS(i)) with a predetermined bit repetition duration (BW) depending on the analog signal by way of a sigma-delta modulator () and, during a time interval which has a duration which is at least as great as the period of the pulse width modulation: multiplying a respective bit (BS(i)) of the bit stream by a corresponding rating coefficient (BK(i)) for generating a respective bit/rating coefficient product and summing the respective bit/rating coefficient products, wherein the sum represents the digital signal.