CIRCUIT DE PROTECTION CONTRE DES DECHARGES ELECTROSTATIQUES

L'invention concerne un circuit de protection contre des décharges électrostatiques (10) comprenant, en parallèle, un thyristor (12) et une première diode à avalanche (14). An electrostatic discharge protection circuit includes a diode bridge in parallel with a thyristor and a first avalanche diode. The diode bridge is coupled between first and second nodes. The thyristor has an anode coupled to the first node and a cathode coupled to the second node. The first avalanche diode has a cathode coupled to the first node and an anode coupled to the second node. A second avalanche diode has a cathode coupled to the first node and an anode coupled to a gate of the thyristor. When an electrostatic discharge occurs, current flows through the diode bridge, into the first node, and is first dissipated by the avalanche diode and is thereafter also dissipated by the thyristor once the thyristor turns on.