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:
May. 16, 2017
Filed:
Dec. 21, 2015
Schneider Electric Usa, Inc., Schaumburg, IL (US);
Kevin M. Jefferies, Raleigh, NC (US);
Benjamin W. Edwards, Rolesville, NC (US);
Matthew L. White, Raleigh, NC (US);
Konstantin Alexander Filippenko, Grenoble, FR;
Richard Karl Weiler, Wake Forest, NC (US);
SCHNEIDER ELECTRIC USA, INC., Andover, MA (US);
Abstract
A dynamic digital filtering system for detecting electrical noise in a discrete I/O circuit. The dynamic digital filtering system has a controller for monitoring the logic signal produced by a logic device monitoring a remote I/O device. The logic device includes a circuit for dynamically adjusting the impedance across a power terminal and a terminal receiving a binary signal from the I/O device. Upon a change of state of the monitored logic signal the controller commands the impedance adjusting circuit to momentarily change its input impedance to determine if the binary signal responsible for the monitored change of state of the logic signal was true or false. If the monitored logic signal does not change state during the momentary change in impedance the binary signal will be verified as 'true'. If the monitored logic signal does change state during the momentary change in impedance the binary signal will be considered as 'false'.