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:
Nov. 21, 1995
Filed:
May. 01, 1992
Makoto Kogure, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A field sensor communication system is arranged in such a manner that, when an electric current, the level of which can be changed to a predetermined level, is, transmitted to a signal transmission line having at least one load resistor connected in series and the voltage change across the load resistor due to the change in the electric current is detected as a reception signal, the predetermined level is cyclically changed to a plurality of levels so that the level at which a good signal reception condition can be realized is determined to perform a communication at the thus determined level. As a result, even if the value of the load resistor in the signal transmission line is changed, the communication can be performed normally, since an undesirable change of the level of the reception signal can be prevented.