Patent ID: 6864736

Claim:
A high-voltage inverter amplifier device, comprising: an input for receiving a low-voltage logic signal; an output for delivering a high-voltage logic signal; a level transposition stage connected to the input; an output stage comprising an output transistor connected between a high-voltage supply terminal and the output; and an intermediate stage intended to drive the output stage and connected between the supply terminal, the level transposition stage and a gate of the output transistor, wherein the intermediate stage comprises: a drive transistor of the thin-gate-oxide high-voltage MOS type connected between the supply terminal and the gate of the output transistor; at least one first diode, the cathode of which is connected to a gate of the drive transistor and the anode of which is connected to the level transposition stage; and control means connected to the gate of the drive transistor so as to make it conduct when an initially zero supply voltage at the supply terminal reaches the threshold voltage of the drive transistor.