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:
Sep. 29, 2015
Filed:
Dec. 27, 2010
Keisuke Yamamoto, Kokubunji, JP;
Hiroshi Shinoda, Kodaira, JP;
Takahide Terada, Tokyo, JP;
Junichi Sakano, Hitachi, JP;
Kohei Onda, Tokai, JP;
Keisuke Yamamoto, Kokubunji, JP;
Hiroshi Shinoda, Kodaira, JP;
Takahide Terada, Tokyo, JP;
Junichi Sakano, Hitachi, JP;
Kohei Onda, Tokai, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to provide a communication system which performs a communication while maintaining high voltage insulation, a control circuit which is operated at a low voltage, and a controlled circuit which is operated at a high voltage are connected through a propagation layer having a waveguide structure, thereby performing a communication. In particular, a displacement current (surge current) flows between a high voltage circuit and a low voltage circuit due to a potential fluctuation which occurs in the high voltage circuit A surge current protection circuit is provided, and applying an input which is out of rating to the communication module and the low voltage circuit due to such a surge current is prevented.