Em Microelectronic-marin Sa

Athos Canclini

Mario Dellea

Can Baltaci

Clement Cheung

An output driver (), including: a first supply rail (A) configured to receive a high supply electrical voltage (Vdd); a second supply rail (B) configured to receive a low supply electrical voltage (Vss); a pad terminal () configured to output an output electrical voltage (V_pad_out); an output stage () connected to the pad terminal () and to the first and second supply rails (A,B). The output stage () has an electrical clamping circuit (A,B) including a semiconductor electronic switching component (Q, Q) made of a first type of semiconductors and a semiconductor electronic switching component (Q, Q) made of a second type of semiconductors. A resistor (R, R) is connected between the first or second supply rail and the semiconductor electronic switching component (Q, Q) of the first type, at an intermediate terminal ().

Output driver provided with an active overvoltage protection

According to an aspect of the disclosure a ring-oscillator control circuit includes a voltage reference, a ring oscillator, a power supply and a supply controller. The supply controller may be configured to select the power supply among an energy storage and an energy source such as to supply the ring oscillator in function of the voltage reference.

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Neuchâtel, Switzerland

Athos Canclini