Patent ID: 6867633

Claim:
An electronic system including at least a first electronic device D 1 with semiconductor components, at least an input terminal, an output terminal, a high supply terminal brought to a high potential V DD , and a low supply terminal brought to a low potential V SS , defining a supply voltage V DD −V SS , wherein said electronic device D 1 has a transfer function H 1 the graphic representation of which as a function of said supply voltage includes three successive ranges, the first range ranging from low values of V DD −V SS to a value V T , called the threshold voltage of the semiconductor components, said first range corresponding to a value h 1 of H 1 that is high and substantially constant, the second range ranging from V T to a value V C2 , corresponding to a sharply sloping decrease in H 1 and the third range extending beyond V C2 , corresponding to a value h 2 of H 1 that is low and substantially constant, wherein said first device D 1 includes at least a capacitive type voltage divider stage connected on the one hand to a first of said two supply terminals and on the other hand, to said input terminal, and wherein said voltage divider stage includes at least a capacitive element with variable capacitance, wherein said capacitive element with variable capacitance is a transistor including a gate connected to said output terminal of said first electronic device D 1 , a source and a drain connected to each other and connected to said first supply terminal, wherein said transistor is made in SOI technology, wherein said first device D 1 also includes polarisation means for said transistor connected on the one hand to the second of said two supply terminals and on the other hand to the gate of said transistor, and wherein said transistor is of the N type and wherein its source and its drain are connected to said low supply terminal.