Abstract: A dual communication frequency RFID circuit includes a logic unit for processing data signals received or transmitted at a first frequency by a first antenna or at a second frequency by a second antenna, and a unit for managing the state of a tamper loop linked to the integrated circuit by two connection terminals. The management unit includes a first low-pass filter linked to a first connection terminal, a second low-pass filter linked to a second connection terminal, a current source for supplying a current through the first low-pass filter, a switch linked at the output of the second low-pass filter, and a first inverter connected between the current source and the first low-pass filter for supplying an output signal for the state of the tamper loop to the logic unit.

Abstract: A dual communication frequency RFID circuit includes a logic unit for processing data signals received or transmitted at a first frequency by a first antenna or at a second frequency by a second antenna, and a unit for managing the state of a tamper loop linked to the integrated circuit by two connection terminals. The management unit includes a first low-pass filter linked to a first connection terminal, a second low-pass filter linked to a second connection terminal, a current source for supplying a current through the first low-pass filter, a switch linked at the output of the second low-pass filter, and a first inverter connected between the current source and the first low-pass filter for supplying an output signal for the state of the tamper loop to the logic unit.

Abstract: A receiver unit for a radio frequency (RF) tag is provided, including a first input terminal and a second input terminal each being connected to an antenna; a communication stage configured to demodulate and/or to modulate an incoming signal in the communication stage; and a power stage including a voltage converter circuit being configured to supply power to the receiver unit, and a regulation circuit being configured to limit an output voltage of the voltage converter circuit, wherein the regulation circuit includes a regulator circuit being configured to determine a first current value and a second current value, the second current value being a current value provided in addition to the first current value, and, if the second current value exceeds a predetermined threshold value, to supply a control signal to a limiter circuit configured to limit an input voltage of the voltage converter circuit.

Abstract: The present invention concerns a receiver unit comprising a first and a second input terminal to which are connected an antenna, a communication stage adapted to demodulate and/or modulate an incoming signal in said communication stage and a power stage comprising an AC/DC voltage converter for powering the rest of the circuit.

Abstract: A transponder circuit includes an antenna for receiving radio frequency signals and an extraction unit for extracting therefrom energy for the transponder circuit, a non volatile memory unit, a control logic unit that activates a received energy evaluation unit when a write operation is received. The evaluation unit is arranged directly at the antenna to provide the control logic unit with a signal representative of the status of energy available in the antenna indicating whether the available energy is greater than a minimum level for ensuring a proper write operation or not, wherein the control logic unit is arranged for performing, or not performing, the write operation. The evaluation unit includes a resistive divider including a set of resistors or a programmable current source and rectifier means on each connector of the antenna for simulating a write operation in the memory and energy recoverable by the power supply.

Abstract: An integrated radiofrequency circuit (1) is provided that includes an antenna (2) for receiving radiofrequency signals, a rechargeable battery (3) and a battery charger (5) using the radiofrequency signals to charge said battery. The circuit is characterized in that the battery charger is integrated in the same substrate as the integrated radiofrequency circuit and in that the battery charger includes a calibrating mechanism, a current source calibrated by the calibrating mechanism and delivering a charge current of constant maximum intensity drawn from the received radiofrequency signals, and a comparator between a reference quantity representative of the end of battery charge level and a variable quantity representative of the battery charge level supplying at output a control signal (batchend) for charging or not charging the battery.

Abstract: A transponder circuit includes an antenna (1) for receiving radio frequency signals and an extraction unit (30) for extracting therefrom at least a part of the energy necessary for the transponder circuit, a non volatile memory unit (60), a control logic unit (20) for the circuit that activates a received energy evaluation unit (71) when a write operation is received by the radio frequency signals. The evaluation unit is arranged directly at the antenna so as to provide the control logic unit with a signal (pwchok) representative of the status of the energy available in the antenna indicating whether the available energy is greater than a minimum level for ensuring a proper write operation or whether the available energy is less than the minimum level for ensuring a proper write operation, the control logic unit being arranged for performing, or respectively not performing, the write operation.

Abstract: The invention concerns an integrated radiofrequency circuit (1) including an antenna (2) for receiving radiofrequency signals, a rechargeable battery (3) and a battery charger (5) using said radiofrequency signals to charge said battery. The circuit is characterized in that said battery charger is integrated in the same substrate as the integrated radiofrequency circuit and in that said battery charger includes calibrating means, a current source calibrated by said calibrating means and delivering a charge current of constant maximum intensity drawn from the received radiofrequency signals and a comparator between a reference quantity representative of the end of battery charge level and a variable quantity representative of the battery charge level supplying at output a control signal (batchend) for charging or not charging the battery.

Abstract: A heat exchanger is manufactured by assembling a bundle of pipes to a pair of header tanks by inserting the ends of the pipes into corresponding holes in the header tanks. The ends of the pipes include a brazing material. The assembled heater core is placed into an adapted enclosure, and heated, for example, by induction or laser heating, to a temperature above the melting temperature of the brazing material to mechanically fix the ends of the pipes to the holes. Subsequently, the heater is switched off and the heat exchanger is cooled within the enclosure.

Abstract: A portable receiver includes a first reception stage with three antennae (1, 2 and 3) oriented so as to form a substantially orthogonal coordinate system, a second stage (4, 5, 6, 7, 8 and 10) for processing the signals (V1, V2 and V3) delivered at the antennae outputs, and a third selection or combination stage (9) for the signals delivered at the output of the second processing stage. The processing stage and the third stage are arranged so as to provide an output signal independent of the position of the receiver in relation to the transmitter.

Abstract: A method for manufacturing a metallic component comprises the steps of assembling different metallic parts of said component, and subsequently fixing the assembled parts by heat treatment. According to the invention, said heat treatment includes the steps of placing the assembled parts in an adapted enclosure, associating heater means with said assembled parts, and subsequently switching on said heating means within said enclosure in order to heat said assembled parts to a predetermined temperature at which mechanical fixing of said assembled parts occurs. The method is preferably used in the manufacturing of heat exchangers.

Abstract: The invention relates to a portable receiver comprising two antennae (10, 20) which are designed to receive an external electromagnetic signal in a given frequency range, and which are orientated along different axes. The receiver also comprises two phase shifter circuits (12, 22) each connected to an antenna, and multiplexing means (24) to which are connected in input said phase shifter circuits and in output a receiving unit receiving the external phase-shifted electromagnetic signal. Moreover there are provided, between at least one of the phase shifter circuits (12) and the antenna (10) connected to this circuit, correction means (Rcor, Ccor) which are a function of said phase shifter means, of said multiplexing means and of the antennae. The correction means are designed to provide, in output of the phase shifter circuits, first and second electrical signals substantially phase-shifted by an angle of &pgr;/2, one with respect to the other and substantially equal in amplitude.

Abstract: Electronic device for monitoring the temperature of a medium ensures that the temperature has not reached pre-established index limit values. The device includes contacts for closing an electric charge flow circuit when the temperature reaches an index limit value, an electric charge storage component connected to the charge flow circuit when the contacts close, the charges remain stored as long as the temperature does not reach one of its index limit values, and is able to flow through the charge flow circuit when the circuit is closed by the contacts, the charge storage not returning to the charge state which they had before the charge flow circuit closed if the latter opens again, and a provision for reading enabling the charge state to be determined.

Abstract: A fluxer applies powdered flux to an object. The fluxer includes an enclosure that defines a chamber where the object is fluxed. The enclosure includes an inlet for receiving the object into the chamber prior to application of the flux and an outlet for discharging the object from the chamber after the flux has been applied. A conveyor extends through the enclosure for traversing the object into and out of the chamber. The fluxer also includes a hopper for storing the flux and an applicator in fluid communication with the hopper for applying the flux to the object. A flux recovery system is in fluid communication with the chamber to introduce and maintain a negative pressure within the chamber. As a result, excess flux is retained within the enclosure. This excess flux can then be recovered and recycled to the hopper.

Abstract: A fluxer applies powdered flux to an object. The fluxer includes an enclosure that defines a chamber where the object is fluxed. The enclosure includes an inlet for receiving the object into the chamber prior to application of the flux and an outlet for discharging the object from the chamber after the flux has been applied. A conveyor extends through the enclosure for traversing the object into and out of the chamber. The fluxer also includes a hopper for storing the flux and an applicator in fluid communication with the hopper for applying the flux to the object. A flux recovery system is in fluid communication with the chamber to introduce and maintain a negative pressure within the chamber. As a result, excess flux is retained within the enclosure. This excess flux can then be recovered and recycled to the hopper.

Abstract: The present invention concerns an electronic device for monitoring the temperature of a medium to be monitored enabling one to make sure that the temperature has not reached at least a pre-established index limit value, characterised in that it includes:

Abstract: A multitasking controller comprising task storage means (2) for storing up to N tasks (P0,P1,P2,P3) each comprising a sequence of instructions, a microprocessor for processing, by time-sharing, a plurality of such N tasks, and a random access memory (12) for storing variable data created and used by said microprocessor. The microprocessor further comprises a scheduler (7) realized in hardware for controlling the use of said microprocess or by such processes, and program counter storage means for storing N program counters (Pc0,Pc1,Pc2,Pc3) each for use by the scheduler (7) is able select a different one of the program counters (Pc0,Pc1,Pc2,Pc3) when the task processed by the microprocessor is changed without the transfer of data from the random access memory (12). FIG.