Stmicroelectronics S.a.

Stmicroelectronics(tours) Sas

Université François Rabelais

Arnaud Florence

Jérôme Heurtier

Guillaume Bougrine

Franck Galtie

Mathieu Rouviere

Sophie Ngo

Daniel Alquier

Edgard Jeanne

Jérome Heurtier

Franck Galtié

An electrostatic discharge protection device includes first and second diodes series-connected between first and second connection terminals. A third connection terminal is coupled to a junction of the first and second diodes. A capacitor is connected in parallel with the first and second diodes between the first and second terminals.

Electrostatic discharge protection device having an adjustable triggering threshold

A data transmission device includes a coder configured to code the data into a multifrequency signal. A first array of ultrasonic transducers with a vibrating membrane is disposed on a first surface of a wafer. The first array configured to convert the signal into a multifrequency acoustic signal propagating in the wafer. A second array of ultrasonic transducers is disposed on a second surface of the wafer. The second array includes at least two assemblies of vibrating membrane ultrasonic transducers having resonance frequencies equal to two different frequencies of the multifrequency signal.

Galvanically-isolated data transmission device

An overvoltage protection device capable of protecting a power supply line and including in parallel a break-over diode, a controlled switch, and a circuit for controlling the switch.

Overvoltage protection device

A method and a system for transferring a digital signal through a transformer, in which the current in a primary winding of the transformer is a frequency-modulated signal exhibiting sinusoidal trains of different durations according to the rising or falling edge of the digital signal to be transferred.

Transfer of digital data through an isolation

A method and a system for transferring a digital signal through a transformer, including a circuit for coding the digital signal to be transferred, having two outputs connected to the respective ends of a primary winding of the transformer, and a circuit for decoding the current in a secondary winding of the transformer generating a rising, respectively falling edge, of an output signal according to the direction of detected current pulses.

Transfer of digital data through a transformer

The protection of an inductance of a voltage step-up converter, comprising a first switch with an inverted input logic between the inductance and a terminal of connection of a load to be supplied, the control electrode of which can be connected either to the inductance supply voltage, or to a voltage smaller than the voltage of a power electrode of said first switch, on the inductance side.

Short-circuit control in the inductance of a voltage step-up converter

A method and a circuit for limiting the current in an inductance, comprising means for interrupting the power storage in the inductance at the end of a delay triggered by the current in the inductance.

Current limitation in an inductance with a limit current adaptation

A controllable rectifying element, comprising a bipolar transistor having a current input terminal connected to a control terminal by a first switch and having a current output terminal connected to the control terminal by a second switch, the turn-off and turn-on phases of the first and second switches being complementary and depending on the state desired for the rectifying element.

Integrated rectifying element

A generator of at least one pulse width modulated signal, including: a generator of a sawtooth signal a generator of high and low reference signals defining, based on a set-point signal, a linear range of each ramp of the sawtooth signal at least one element of comparison of the sawtooth signal with each of the reference signals and at least one element of logic combination of the comparison results, providing the pulse width modulated signal.

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Saint Antoine du Rocher, France

Arnaud Florence