Patent ID: 11928541
Assignee: STMICROELECTRONICS (ROUSSET) SAS
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A system, comprising:
a closed container; and
a detection device comprising a contactless passive transponder configured to communicate with a reader via an antenna using a carrier signal, the contactless passive transponder including:
an integrated circuit having two input terminals connected to the antenna and two output terminals linked by a first electrically conductive wire having a severable part and designed to be severed at the severable part in response to an opening or an attempted opening of the closed container; and
a shorting circuit configured to short-circuit a first one of the two output terminals with a first one of the two input terminals in response to a severing of the severable part and reconstruction of an electrical connection between the two output terminals, wherein said shorting circuit comprises an electrically conductive element arranged adjacent the severable part of the first electrically conductive wire and linked to a first of the two input terminals by a second electrically conductive wire, said electrically conductive element being electrically insulated from the first electrically conductive wire in an absence of severing of said first electrically conductive wire;

wherein the detection device has a first configuration in which the first electrically conductive wire is not severed and is electrically insulated from the shorting circuit, and has a second configuration in which the first electrically conductive wire is severed at the severable part to form two wire parts, wherein ends of the two wire parts are electrically joined back together by an electrically conductive joining material also coming into contact with a part of the shorting circuit, wherein the electrically conductive joining material makes contact with the electrically conductive element and the first electrically conductive wire when the detection device is in said second configuration.