Patent ID: 8564364

Claim:
A method, comprising: detecting that a voltage of at least one of a first local ground terminal and a first power supply terminal crosses a first threshold voltage, the first local ground and first power supply terminals being part of a first data processing circuit of a microcircuit in a substrate, the microcircuit including first and second wells and a first embedded region formed in the substrate, the first well being electrically isolated from a main portion of the substrate by the second well and the first embedded region; the first local ground terminal being formed in the first well and the first power supply terminal being formed in the second well; activating a first detection signal in response to detecting the voltage at the at least one of the first local ground and first power supply terminals of the first data processing circuit crossing the first threshold voltage; and supplying a bias voltage to the first local ground terminal of the first data processing circuit through a resistor or a bias circuit coupling the first local ground terminal of the first data processing circuit to a ground of the substrate.