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: The invention concerns a switch-mode voltage regulator, comprising : an inductor (L); a generator for producing a voltage ramp (16); circuitry (12, 13) for producing at least one pulse stream from said voltage ramp; switch control circuitry (14) for controlling switching of a current in the inductor according to said pulse stream; and a first control loop adapted to modulate the form of the voltage ramp according to the current flowing in the inductor.

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.

Abstract: An embodiment of a current sensing device for a DC-DC converter comprising an output node through which passes an output current and taken to an output potential equal respectively to first and second values. The current sensing device comprises an amplifying module comprising a retroaction node through which passes a mirror current that is proportional to the output current and taken to the potential present on a first input of the amplifying module. The device also comprises a first intermediate module mounted between the first potential and the output node, comprising an intermediate node connected to the first input and taken to an intermediate potential equal to third and fourth values respectively correlated to the first and second values, wherein the difference between the third and fourth values is smaller than the difference between the first and second values.

Abstract: An embodiment of a DC voltage converter, producing an output voltage (VS) at an output terminal from an energy source, comprises: a selector switch comprising 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 of which is coupled to the output terminal of the converter, a capacitor being coupled between the output terminal and the ground, a regulator to produce a control signal as a function of a result of a comparison of the output voltage with a reference voltage, a control circuit to couple the output of the selector switch to the first or second input of the selector switch, as a function of the control signal. According to an embodiment of the invention, the converter may also comprise a means of inhibition adapted to inhibiting the control circuit when a current flowing in the inductor gets cancelled.

Abstract: An integrated circuit having a first couple of components R and C, at least a second couple of components R1–R3 and C?1–C?2 and a calibration circuit. The couple of componets form an RC cell of which one component is adjustable, and the calibration circuit. The invention corrects the errors in the values of the components of RC cells of the same nature. The calibration circuit performs the adjustment of an RC cell and then applies the same correction to the components of the other RC cells of the same nature.

Abstract: The switch mode power supply includes a switching cell SC controllable cyclically and including only one inductive element L and several individually selectable outputs. During each conduction cycle, a total power level corresponding to the sum of the individual power levels respectively required by all the outputs OUTi during this cycle is injected into the inductive element L, the outputs requiring a non-zero individual power level are selected successively and in a predetermined order that is identical for all the cycles, and, at each selected output, the corresponding individual power level is produced.

Abstract: The invention is an integrated circuit comprising a first component couple R and C, at least a second component couple R1—R3 and C?1-C?2 and a calibration circuit 106. The component couples are RC cells. The invention corrects the errors in the values of the components of the RC cells of the same nature. Each RC cell comprises a component R, C?1 and C?2 having an adjustable value. The calibration circuit 106 performs the adjustment of an RC cell, then applies the same correction to the components of the other cells of the same nature.

Abstract: The switch mode power supply includes a switching cell SC controllable cyclically and including only one inductive element L and several individually selectable outputs. During each conduction cycle, a total power level corresponding to the sum of the individual power levels respectively required by all the outputs OUTi during this cycle is injected into the inductive element L, the outputs requiring a non-zero individual power level are selected successively and in a predetermined order that is identical for all the cycles, and, at each selected output, the corresponding individual power level is produced.