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:
Jan. 20, 2009
Filed:
Mar. 16, 2006
Yusuke Ukai, Komaki, JP;
Yusuke Ukai, Komaki, JP;
OMRON Corporation, Kyoto, JP;
Abstract
An antenna failure detecting device that can avoid erroneous detection and use a reference voltage of relatively low precision is includes a switch that can short-circuit both the ends of a resistor inserted in a common line. Only when the voltage between both the ends of the resistor is detected, the switch is 'disconnected' (off), and when the voltage between both the ends of the resistor is not detected, the switch is 'connected' (on). Therefore, the effect of the resistor can be excluded, and the unnecessary loss of the common line at the non-detection time can be eliminated. Furthermore, the resistor is used only at the failure detection time, and thus the resistance value of the resistor can be freely increased. Therefore, a large voltage between both the ends can be taken out, and the permissible range of the reference voltage for failure judgment can be broadened, so that a reference voltage of low precision can be used.