Patent ID: 11893146
Assignee: ARM LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A method comprising:
providing shield wiring with wire segments;
coupling the wire segments to an operational amplifier;
sensing a resistance differential or a voltage change across the wire segments with the operational amplifier;
detecting a tampering event associated with at least one of a cut, an open, a strap, a short, and probing in reference to sensing the resistance differential or the voltage change; and
generating an alarm signal based on detecting the tampering event,
wherein coupling the wire segments to the operational amplifier includes:
coupling a first wire segment of the wire segments between an inverting input of the operational amplifier and ground, and
coupling a second wire segment of the wire segments between the inverting input of the operational amplifier and an output of the operational amplifier.