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:
Oct. 22, 2002
Filed:
May. 09, 2001
William J. Britz, Kirkland, WA (US);
Fluke Corporation, Everett, WA (US);
Abstract
A precision RMS measurement system is provided by extending the effective resolution of a medium-resolution sampling RMS converter. An AC or other time-varying cyclic signal is simultaneously applied to an average-responding AC-to-DC converter and to a high-speed medium resolution sampling analog-to-digital converter. The average voltage produced by the AC-to-DC converter is measured by a precision analog-to-digital converter to produce a highly accurate DC voltage measurement. The output of the sampling analog-to-digital converter is provided to a digital signal processor, which calculates the RMS and average values. A microprocessor then multiplies the ratio of the calculated RMS and average values by the highly-accurate DC average to produce a highly accurate RMS voltage. The precision RMS voltage is then displayed.