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:
Jun. 25, 1991
Filed:
Jul. 17, 1990
Applicant:
Inventor:
Didier Fraisse, St. Martin D'Heres, FR;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ;
U.S. Cl.
CPC ...
324132 ; 328144 ; 364841 ;
Abstract
The measuring device of the rms value of a signal comprises, in series, a full-wave rectifier, a low-pass filter, for example of the RC type, and a peak detector. The output signal of the device is representative of the rms value of the input signal, the cut-off frequency of the filter corresponding to an angular frequency comprised between 4.pi.f/6 and 4.pi.f/5.33, f being the fundamental frequency of the input signal of the device.