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Christophe Entringer

Sylvain Grosjean

Alexandre Deschildre

Thomas Coulot

Jean-Michel Daga

Paul Muller

Pierre Muller

Matteo Contaldo

Luca Rossi

Julien Coltier

Arthur Hugh Macdougall

Fritz Mbumb-Kumb

An RFID assembly and an assembly method thereof are provided. The assembly method for an RFID assembly comprises a step of providing at least one integrated circuit which includes at least one IC contact and at least one dielectric layer, and a deposition of at least one electrical contact and of at least one re-passivation layer. The at least one electrical contact is deposited on at least one first portion and the at least one re-passivation layer is deposited on at least one second portion, which is distinct of the at least one first portion.

RFID assembly and assembly method thereof

An integrated circuit chip (), an antenna () and a tamper loop (), and in addition to this, a light emitting diode (LED) (), configured to be activated, i.e. supplied with current, upon a signal received by the antenna (). The LED () is integrated in the device in such a way that when the LED is activated in the above-described way, the LED lights up so as to become visible by the naked eye, on the condition that the tamper loop () is in a predefined state, either open or closed. The LED () is coupled between the same terminals () of the integrated circuit chip () as the tamper loop ().

Tamper detection device

The electronic measurement circuit comprises a measurement sensor with two differential mounted capacitors each comprising a fixed electrode, and a common electrode arranged to move relative to the fixed capacitor electrode to alter the capacitive value when the physical parameter is measured. The circuit further comprises a first integrator unit connected to the common electrode for integrating charge received from the sensor, and comprising two integrators arranged to be connected alternately to the common electrode, a first comparator for comparing analogue output values from the first integrator unit, a second integrator unit for integrating charge received from the first integrator unit, a second comparator for comparing analogue output values from the second integrator unit, a switch circuit for switching different voltage values across the capacitors, and a feedback circuit for feeding a digital output signal from the first comparator to the switch circuit for controlling its operation, and an incremental calculation unit receiving digital output signals from the comparators and supplying a final digital output signal.

Electronic measurement circuit

The present invention concerns an electronic measurement circuit for measuring a physical parameter. The circuit comprises: a measurement sensor comprising two differential mounted capacitors each comprising a fixed electrode, and a common electrode, common to the two capacitors which is arranged to be movable relative to each fixed electrode of the two capacitors in order to alter the capacitive value of each capacitor when the physical parameter is measured. The circuit further comprises a first integrator unit connected to the common electrode for integrating charge received from the measurement sensor, and comprising two integrators arranged to be connected alternately to the common electrode; a second integrator unit connected to the first integrator unit for integrating charge received from the first integrator unit; a comparator for comparing analogue output values from the second integrator unit; a switch circuit connected to the measurement sensor for switching different voltage values across the two capacitors; and a feedback circuit for feeding a digital output signal of the comparator to the switch circuit for controlling the operation of the switch circuit.

The electronic circuit measures angular speed in a gyroscope, which includes a mass connected to a spring and a damping element, an actuation capacitor for actuating the mass and a detection capacitor for detecting motion of the mass. The electronic circuit includes a measurement resistor, which is connected to the moving mass and has a variation in resistive value equal to the oscillation frequency of the mass. The resistor is polarized to supply a measurement signal, which includes a carrier signal in phase with the oscillation of the mass and an angular speed signal phase shifted by &#x3c0;/2 relative to the carrier signal The measurement signal is supplied to an integration unit clocked by a clocking signal phase shifted by &#x3c0;/2 relative to the carrier signal and originating from the drive circuit. The angular speed signal is demodulated at the integration unit output.

Electronic circuit for measuring rotational speed in a MEMS gyroscope and method for actuating the circuit

The method is for measuring a physical parameter via an electronic circuit connected to a two differential capacitor sensor having two fixed electrodes and a common moving electrode. The circuit supplies first and second digital measuring signals. Each measuring cycle consists on biasing fixed electrodes by a first biasing and a second biasing reverse of the first biasing, alternated with biasing the electrodes by the measuring voltage based on first and second digital signals. Each conversion starts by a small step value added to or subtracted from each digital signal in each cycle. If the successive identical amplifier output states counted or counted down by a counter is higher than a threshold, a large step value is added to or subtracted from the digital signals in each cycle. Re-adaptation to the small step value occurs when a sign change is detected in the counter, until the conversion end.

Method of measuring a physical parameter and electronic interface circuit for a capacitive sensor for implementing the same

An electronic circuit for driving a resonator of a MEMS-type resonator device is provided. The resonator includes a mass connected to a spring and a damping element, an actuation element for actuating the mass via an actuation signal, and a detection element for detecting motion of the mass. The electronic circuit includes a conversion means connected to the detection element to supply a mass oscillation derivative signal, a means of comparing the derivative signal amplitude and a reference amplitude for supplying a control signal, and a decision unit for supplying a digital actuation signal. The actuation signal includes rectangular pulses determined on the basis of the derivative signal and of the control signal to adapt the mass oscillation amplitude according to the reference amplitude.

Electronic drive circuit for a MEMS type resonator device and method for actuating the same

A physical parameter is measured via an electronic circuit connected to a two capacitor sensor. The circuit includes an amplifier connected to the common capacitor electrode, a logic unit for digital processing amplifier data and supplying a digital measuring signal, a digital-analog converter for supplying a measuring voltage based on the digital measuring signal, a switching unit for alternately supplying the measuring voltage to the first and second fixed capacitor electrodes, and a regulated voltage for negative biasing or a low voltage for positive biasing from a voltage supply source. A first phase consists in biasing the first fixed electrode with the measuring voltage from first binary word and reference voltage, and the second fixed electrode with low voltage, and a second phase consists in biasing the second fixed electrode with measuring voltage from second binary word, which is reverse of the first binary word, and the reference voltage.

The method is for measuring a physical parameter by an electronic circuit connected to a two differential capacitor sensor having two fixed electrodes and a common moving electrode. The electronic circuit supplies first and second digital measuring signals. Each measuring cycle consists on biasing the electrodes by the measuring voltage based on the first digital signal, connecting the fixed electrodes to a supply voltage source for a first biasing, biasing the electrodes by the measuring voltage based on the second digital measuring signal, and inversely connecting the fixed electrodes to a supply voltage source for a second biasing. In first successive measuring cycles, the first and second digital signals are adapted to each cycle by a large step value. In second successive measuring cycles, the first and second digital signals are adapted to each cycle by a small step value until the end of the conversion.

Method for reading a barcode by means of an optical reader arranged to capture at a determined sampling frequency a series of partial images of the barcode by a sensor having at least one line of pixels. According to the invention it is provided to determine in each partial image a logical value as a function of the light intensity received by a central pixel of the line of pixels and a corresponding bar width when this bar is completely incorporated into the partial image in question. By only setting a maximum speed for the speed of movement of the barcode and dimensioning the line of pixels to ensure that each bar of this barcode is completely incorporated into a partial image at least once, the sequence of bits defined by the barcode is determined by means of an algorithm ignoring the duplications detected in consecutive partial images.

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Corcelles-pres-Concise, Switzerland

Christophe Entringer