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. 24, 1981
Filed:
Feb. 07, 1979
Applicant:
Inventor:
Jacques L Fromont, Vanves, FR;
Assignee:
Jeumont-Schneider, Puteaux, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318318 ; 318314 ; 318341 ;
Abstract
The frequency of a pulse generator, which could be the tachometer of a motor, is measured with a fast clock and a slow clock using a computer to calculate the frequency .omega.=k N1/N2, where N2 is a count of pulses accumulated in a register during each period of the slow clock while N1 is the count of the fast clock during the same period. Depending upon whether the measured frequency is higher or lower than the slow clock frequency, a comparator causes measurement to occur at the end of N2 pulses or with N2=1.