Abstract: An X-ray detector includes a first circuit with an NPN-type bipolar transistor and a second circuit configured to compare a voltage at a terminal of the NPN-type bipolar transistor with a reference value substantially equal to a value of the terminal voltage which would occur when the first circuit has been exposed to a threshold quantity of X-rays.

Abstract: An X-ray detector includes a first circuit with an NPN-type bipolar transistor and a second circuit configured to compare a voltage at a terminal of the NPN-type bipolar transistor with a reference value substantially equal to a value of the terminal voltage which would occur when the first circuit has been exposed to a threshold quantity of X-rays.

Abstract: A switched-mode power converter device includes an inductive element coupling a first node receiving an input voltage to a second node. A first transistor couples the second node to a third node generating an output voltage. A control circuit includes a first switch coupling the third node to a control terminal of the first transistor.

Abstract: A reader is adapted to wirelessly exchanging information with a wireless apparatus. The reader includes a signal generator configured to generate a modulation signal. An emitter/receptor stage is configured to be driven by the modulation signal. A switched-mode power supply is configured to power the emitter/receptor stage. The switched-mode power supply includes a power switch controlled in function of the modulation signal.

Abstract: The invention concerns a measurement unit including: an electric ambient energy recovery generator; an element of capacitive storage of the electric energy generated by the generator; an electric battery; a first branch coupling an output node of the generator to a first electrode of the capacitive storage element; a second branch coupling a first terminal of the battery to the first electrode of the capacitive storage element; and an active circuit capable of transmitting a radio event indicator signal each time the voltage across the capacitive storage element exceeds a first threshold, wherein, in operation, the capacitive storage element simultaneously receives a first charge current originating from the generator via the first branch and a second charge current originating from the battery via the second branch.

Abstract: A switched-mode power converter device includes an inductive element coupling a first node receiving an input voltage to a second node. A first transistor couples the second node to a third node generating an output voltage. A control circuit includes a first switch coupling the third node to a control terminal of the first transistor.

Abstract: A voltage or current generator has a configurable temperature coefficient and includes a first voltage generator that generates a first voltage having a first negative temperature coefficient. A second voltage generator generates a second voltage having a second negative temperature coefficient different to the first negative temperature coefficient. A circuit generates an output level based on the difference between the first voltage scaled by a first scale factor and the second voltage scaled by a second scale factor.

Abstract: The invention concerns a measurement unit including: an electric ambient energy recovery generator; an element of capacitive storage of the electric energy generated by the generator; an electric battery; a first branch coupling an output node of the generator to a first electrode of the capacitive storage element; a second branch coupling a first terminal of the battery to the first electrode of the capacitive storage element; and an active circuit capable of transmitting a radio event indicator signal each time the voltage across the capacitive storage element exceeds a first threshold, wherein, in operation, the capacitive storage element simultaneously receives a first charge current originating from the generator via the first branch and a second charge current originating from the battery via the second branch.

Abstract: A voltage or current generator has a configurable temperature coefficient and includes a first voltage generator that generates a first voltage having a first negative temperature coefficient. A second voltage generator generates a second voltage having a second negative temperature coefficient different to the first negative temperature coefficient. A circuit generates an output level based on the difference between the first voltage scaled by a first scale factor and the second voltage scaled by a second scale factor.

Abstract: A circuit for comparing a voltage with a threshold, including: first and second nodes of application of the voltage; a first branch including a first transistor series-connected with a first resistor between first and second nodes; a second branch parallel to the first branch, including second and third series-connected resistors forming a voltage dividing bridge between the first and second nodes, the midpoint of the dividing bridge being connected to a control node of the first transistor; and a third branch including a second transistor in series with a resistive and/or capacitive element, between the control node of the first transistor and the first or second node, a control node of the second transistor being connected to the junction point of the first transistor and of the first resistor.

Abstract: The generation of a Hall voltage within a semiconductor film of an integrated Hall effect sensor uses the flow of a current within the semiconductor film when subjected to a magnetic field. The film is disposed on top of an insulating layer, referred to as buried layer, which is itself disposed on top of a carrier substrate containing a buried electrode that is situated under the insulating layer. A biasing voltage is applied to the buried electrode.

Abstract: A power management circuit including, between a first terminal intended to be connected to an electric power generation source and a second terminal intended to be connected to a load to be powered, a linear regulator and a circuit capable of activating the linear regulator when the power supplied by said source is greater than a first threshold.

Abstract: A chain of switches is connected between a first power supply line coupled to a first voltage and a second power supply line coupled to the sector. These switches are controllable by a control signal. The control signal is propagated from a first end of the first chain towards a second end of the first chain without control of the switches during this first propagation. The control signal is then propagated in the reverse direction from the second end towards the first end with a control of the switches during this second propagation starting from a group of at least one switch situated at the second end. There is a detection of the arrival of the control signal at the first end of the chain at the end of its propagation in the reverse direction.

Abstract: A circuit for comparing a voltage with a threshold, including: first and second nodes of application of the voltage; a first branch including a first transistor series-connected with a first resistor between first and second nodes; a second branch parallel to the first branch, including second and third series-connected resistors forming a voltage dividing bridge between the first and second nodes, the midpoint of the dividing bridge being connected to a control node of the first transistor; and a third branch including a second transistor in series with a resistive and/or capacitive element, between the control node of the first transistor and the first or second node, a control node of the second transistor being connected to the junction point of the first transistor and of the first resistor.

Abstract: The generation of a Hall voltage within a semiconductor film of an integrated Hall effect sensor uses the flow of a current within the semiconductor film when subjected to a magnetic field. The film is disposed on top of an insulating layer, referred to as buried layer, which is itself disposed on top of a carrier substrate containing a buried electrode that is situated under the insulating layer. A biasing voltage is applied to the buried electrode.

Abstract: A power management circuit including, between a first terminal intended to be connected to an electric power generation source and a second terminal intended to be connected to a load to be powered, a linear regulator and a circuit capable of activating the linear regulator when the power supplied by said source is greater than a first threshold.

Abstract: A pulse width modulation device includes a switching transistor for defining modulation phases, a capacitor, and switches arranged to: a) in a first phase, charge the capacitor to a voltage corresponding to the on/off threshold of the switching transistor, and b) in a second phase, connect the capacitor between a terminal for applying a setpoint voltage and the gate of the switching transistor. A constant current source is connected to apply a current in the capacitor tending to bring the gate of the switching transistor toward the on/off threshold.

Abstract: A DC voltage converter produces an output voltage (VS) at an output terminal from an energy source. The DC voltage convert includes a selector switch includes a first input coupled to the energy source, a second input coupled to a ground, and an output coupled to a first terminal of an inductor. A second terminal is coupled to the output terminal of the converter and a capacitor is coupled between the output terminal and the ground. A regulator produces a control signal as a function of a result of a comparison of the output voltage with a reference voltage. A control circuit couples the output of the selector switch to the first or second input of the selector switch, as a function of the control signal. The converter may also include a means of inhibition adapted to inhibiting the control circuit when a current flowing in the inductor gets cancelled.

Abstract: A chain of switches is connected between a first power supply line coupled to a first voltage and a second power supply line coupled to the sector. These switches are controllable by a control signal. The control signal is propagated from a first end of the first chain towards a second end of the first chain without control of the switches during this first propagation. The control signal is then propagated in the reverse direction from the second end towards the first end with a control of the switches during this second propagation starting from a group of at least one switch situated at the second end. There is a detection of the arrival of the control signal at the first end of the chain at the end of its propagation in the reverse direction.

Abstract: An embodiment of a current measuring device, defined by a gain, including an amplification module including an input for receiving a control signal, an input connected to an output node, brought to an output potential and traversed by an output current, a feedback node traversed by a mirror current associated with the output current by a proportionality coefficient equal to the gain, and an output traversed by the mirror current, and capable of bringing the feedback node to the output potential in response to the control signal. The measuring device also includes a gain modification module, mounted between the first potential and the feedback node, including at least one input for receiving an activation signal, and capable of modifying the value of the gain in response to an activation signal.