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:
Aug. 15, 2017
Filed:
Oct. 06, 2014
Applicant:
Yokogawa Electric Corporation, Musashino-shi, Tokyo, JP;
Inventor:
Ken Ito, Musashino, JP;
Assignee:
Yokogawa Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J 1/00 (2006.01); H02J 3/00 (2006.01); H04B 3/54 (2006.01); H02J 13/00 (2006.01); G05B 19/042 (2006.01);
U.S. Cl.
CPC ...
H02J 13/0003 (2013.01); H04B 3/548 (2013.01); G05B 19/0423 (2013.01); G05B 2219/25132 (2013.01); G05B 2219/34423 (2013.01); H04B 2203/547 (2013.01); H04B 2203/5416 (2013.01); H04B 2203/5483 (2013.01);
Abstract
An isolated signal transmission apparatus isolatingly transmits, from a control-side apparatus to a control target apparatus, an electric signal obtained by superimposing a communication signal on a direct-current signal. The apparatus includes a lower limiter circuit configured to output, to the control target apparatus, a direct-current signal, whose value is a predetermined lower limit value, if a value of the direct-current signal from the control-side apparatus is less than the predetermined lower limit value.