Abstract:
A micro scale includes one substrate forming a first zone constituting a first terminal, one conducting vibrating beam which has two opposite ends affixed on two supporting areas on the substrate, the conductive beam forming a second terminal; wherein the conductive beam is made of polymer gel having metallic microparticles in low quantity so as to avoid any contamination of a biological material to measure, the density of the metallic microparticles being high enough to achieve electrical conduction of the second terminal. A manufacturing process of such a micro scale circuit is also provided.
Abstract:
A band pass filtering circuit based on a quadripole includes a serial branch having a first acoustic resonator presenting a frequency of resonance and a frequency of anti-resonance and mounted in serial with a first capacitor; a parallel branch having a second acoustic resonator resulting from the same manufacturing process as the first resonator and mounted in parallel with a second capacitor of identical value to that the first capacitor. The filtering circuit is particularly but not exclusively adapted to the realization of integrated filtering circuits used in mobile telephony.
Abstract:
An electronic circuit, including; a logic circuit having a plurality of logic cells; storage cells able to form a shift register, able to be connected to the logic cells; a connecting control module having an input for the reception of an identification key, the module connecting the storage cells so as to form a test shift register when the receive input receives a valid identification key, and the module connecting the storage cells so as to form randomly a diversion circuit when the input does not receive a valid identification key. The invention allows the electronic circuit to be protected against fraudulent access in read or write mode. The invention also relates to a smart card including this electronic circuit.
Abstract:
A frequency-shift modulation device includes an oscillating circuit, a phase-locked loop and a digital frequency modulation circuit. The oscillating circuit is connected to the phase-locked loop in order to produce a fixed-frequency clock signal. This clock signal is used for timing the frequency modulation circuit. A standard model crystal oscillator can be used in the oscillating circuit, given that the RF frequency of a wireless transmission signal which is produced by the modulation device is determined digitally.
Abstract:
The present invention relates to a method for programming or erasing memory cells that include a selection transistor connected to a floating-gate transistor. According to the method, a non-zero compensation voltage is applied to the gate of a transistor not involved in the programming or erasing process so as to increase a breakdown threshold of the transistor, and an inhibition voltage is applied to the gate or to a terminal of at least one floating-gate transistor connected to the transistor having its breakdown threshold increased to inhibit a phenomenon of soft programming or soft erase of the floating-gate transistor.
Abstract:
A DRAM and its application to a mobile telephony circuit with a control circuit including a first refreshment controller controlled by a first clock signal and a second refreshment controller controlled by a second clock signal having a frequency less than that of the first one and used to synchronize events of the GSM network.
Abstract:
An integrated circuit semiconductor substrate includes an active silicon layer separated from a silicon substrate layer by a buried insulating material layer. The active silicon layer, however, locally includes at least one over-thickness on the side of the buried layer, while maintaining a flat surface state of the semiconductor layer across the integrated circuit. The over-thickness is created by forming a cavity under the active silicon layer in the local area, and then providing the over-thickness by partially filling the cavity at the bottom of the active silicon layer through epitaxial growth. An insulating layer then fills the remaining portions of the cavity.
Abstract:
A dual-mode smart card comprising several pads of physical contact with an external reader and two pads of connection to an antenna for a contactless operation, and comprising a voltage regulator capable of extracting from a radio frequency excitation reaching the antenna, a supply voltage of the chip's processing circuits, this regulator being controllable by a central circuit to be deactivated in the presence of a supply voltage on contacts of the chip.
Abstract:
A process for realizing a positive electrode of a lithium-ion battery utilizes deposition by cathode sputtering in several steps. Two successive deposition steps are separated by a cooling of the electrode during its realization, a first intermediate step of sputtering the target without introducing oxygen, and a second intermediate step of sputtering the target while introducing oxygen. The electrode obtained is of amorphous vanadium oxide and exhibits good capacity and reversibility.
Abstract:
Circuitry for providing an output video signal from a portable device to an external display, the circuitry including a processor block with an image processor, and a video encoder block with a video encoder for providing the output video signal to the external display, the processor block and the video encoder block being connected to each other by a serial interface arranged to provide image date from the processor block to the video encoder, the serial interface having at least one data lane and at least one first clock lane, wherein the video encoder block includes a first input connected to the at least one data lane for receiving image data and a second input connected to the at least one first clock lane for receiving a first clock signal, and wherein at least one of the video encoder block and the processor block has a third input arranged to receive a control signal for controlling data flow over the serial interface.