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:
Dec. 18, 2018
Filed:
Jan. 26, 2016
Applicant:
Rockwell Automation Technologies, Inc., Mayfield, OH (US);
Inventors:
Joseph Vazach, Mentor, OH (US);
Terry Deloria, Ashtabula, OH (US);
Assignee:
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/00 (2006.01); H03K 17/78 (2006.01); H04B 10/80 (2013.01); G05F 1/56 (2006.01);
U.S. Cl.
CPC ...
H03K 17/78 (2013.01); G05F 1/56 (2013.01); H04B 10/801 (2013.01); H04B 10/802 (2013.01);
Abstract
An input circuit for an I/O module for an industrial controller or the like provides a shunt regulator for precisely controlling the maximum current through the LED of an optical isolator. Substantial improvement in the current regulation decreases power dissipation in the optical isolator element. A low voltage shunt circuit prevents leakage from the shunt regulator from activating the optical isolator at low voltages allowing more sensitive optical isolators providing additional power dissipation savings.