Patent ID: 8094423

Claim:
A circuit comprising a MOSFET protected by a module for blocking said MOSFET, the module being placed between the gate of the MOSFET and an electrical conductor, the module comprising switched connection means having at least two states: a first state which connects the gate of the MOSFET to the conductor, which is maintained at an electrical potential suitable for blocking the MOSFET, this first state being activated in the presence of an alarm signal, a second state which disconnects the gate of the MOSFET, this second state being activated in the absence of the alarm signal, wherein the switching means comprises at least one PIN diode and a switching transistor, the switching transistor being a field-effect transistor, the anode of said PIN diode being connected directly to the gate of the MOSFET, the cathode of said PIN diode being connected directly to the drain of the switching transistor, the source of the switching transistor being connected to the electrical conductor, and the gate of the switching transistor being controlled by the alarm signal, the MOSFET operating at radio frequencies.