Patent ID: 11906332
Assignee: STMICROELECTRONICS (ROUSSET) SAS
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A system, comprising:
a closed container;
an integrated circuit having a first substrate and first and second terminals;
an electrically conductive wire connecting the first and second terminals and having a severable part that is arranged to be severed in the event of an opening or attempted opening of the closed container; and
a detection device configured to detect a severing of the severable part;
wherein the detection device includes, within the integrated circuit:
a first capacitor electrically isolated from the first substrate of the integrated circuit and connected to the first terminal;
a first MOS transistor having source and drain regions that are electrically isolated from the first substrate, and a gate region connected to the second terminal, wherein said first MOS transistor is configured to be in an on-state in response to a zero voltage applied to the gate region and in an off-state in response to a non-zero voltage applied to the gate region;
a second capacitor electrically isolated from the first substrate of the integrated circuit and having a first electrode connected to the drain region of the first MOS transistor; and
a measuring circuit configured to measure a voltage at said first electrode, wherein the voltage of said first electrode is indicative of a present or past severing of said severable part if said voltage is lower than a threshold.