Stmicroelectronics S.a.

St-ericsson Sa

Quickstep Technologies LLC

Christophe Bernard

Alexandre Pons

David Chesneau

Christophe Premont

Cécile Hamon

C&eacute;cile Hamon

Christophe Blondin

Philippe Delpech

Christophe Garnier

Andréa Cathelin

Pierre Troadec

Laurent Salager

The present invention relates to a capacitive detection device, comprising a plurality of individual capacitive measuring electrodes () distributed according to a measuring surface, and connecting tracks () respectively connected to said measuring electrodes (), wherein the measuring electrodes () and the connecting tracks () are arranged according to two distinct optically clear layers separated by an electrically insulating insulation material (). The invention also relates to a method for manufacturing the device, and an apparatus comprising the device.

Multilayer capacitive detection device, and apparatus comprising the device

The switched-mode power supply includes a switching cell having an inductive element with two connections and several individually selectable outputs, and in which the two connections of the inductive element are joined respectively to at least two of the individually selectable outputs. It is thus possible to generate and regulate at least two different voltages, one positive and one negative.

Method of controlling a switched-mode power supply having a single inductive element and several outputs, and corresponding power supply, in particular for a cellular mobile telephone

An electronic circuit includes a substrate. A capacitor and at least one semiconductor component are supported by a surface of the substrate. A substantially planar screen, oriented parallel to the surface of the substrate and made of metallic material, is placed between the capacitor and the semiconductor component. Preferably, the semiconductor component is placed in proximity to the surface of the substrate and several superposed layers of insulating material cover the surface of the substrate and the semiconductor component. The capacitor is then placed within at least one layer of insulating material above the semiconductor component, and the screen is placed within an intermediate layer of insulating material between the layer incorporating the capacitor and the surface of the substrate.

Integrated electronic circuit comprising a capacitor and a planar interference inhibiting metallic screen

A voltage regulator having an output terminal adapted to being connected to a load, including an operational amplifier having its non-inverting input connected to a reference voltage, and its inverting input connected to the output terminal, an inverting amplifier having its input connected to the output of the operational amplifier, a capacitive impedance connected between the input and the output of the inverting amplifier, a power switch controlled by the output of the inverter amplifier, arranged to connect the output terminal to a first supply voltage, said capacitive impedance including a short-circuitable portion associated with active short-circuit means when the current flowing through the load is greater than a predetermined current.

Voltage regulator with enhanced stability

A voltage regulator having an output terminal adapted to being connected to a load, including an operational amplifier having its non-inverting input connected to a first reference voltage, and its inverting input connected to the output terminal, an inverting stage having its input connected to the output of the operational amplifier, a power switch controlled by the output of the inverter stage, arranged between the output terminal and a supply voltage, and a charge capacitor arranged between the output terminal and a reference supply voltage, including a means for reducing the effective output impedance of the operational amplifier.

Voltage regulator with reduced open-loop static gain

A linear regulator having an output stage including first and second P-channel MOS transistors series connected between a first D.C. supply terminal and an output terminal providing a regulated output voltage, and a circuit for controlling the first and second transistors capable of providing the first and second transistors with first and second control signals according to the output voltage and to the voltage at the midpoint of the series connection.

Linear voltage regulator

A ramp capacitor CAPhas a first terminal connected to a power supply voltage VBAT. A generator circuit is connected to a second terminal of the ramp capacitor and adapted to generate a voltage ramp at the terminals of the ramp capacitor. The generator circuit includes a constant current source SCC connected to the second terminal Bof the ramp capacitor CAPand auxiliary circuit MAX adapted in the presence of a transient variation of the power supply voltage to determine the transient current flowing in the ramp capacitor and generated by the transient variation. Responsive thereto, delivery is made to the second terminal Bof the ramp capacitor CAPof a charging current equal to the algebraic sum of the constant current delivered by the constant current source and an auxiliary current equal and opposite to the transient current.

Method of generating a voltage ramp at the terminals of a capacitor, and corresponding device

A voltage regulator having an output terminal adapted to being connected to a load, including a device for limiting the current flowing through the load to a first threshold current if the voltage of the output terminal is lower than a threshold voltage, and to a second current threshold higher than the first current threshold if the voltage of the output terminal is greater than the threshold voltage.

Voltage regulator protected against short-circuits by current limiter responsive to output voltage

A voltage regulator having an output terminal provided for being connected to a load, including an amplifier having its inverting input connected to a reference voltage, and its non-inverting input connected to the output terminal, a charge capacitor arranged between the output terminal and a first supply voltage, first and second voltage-controlled switches each arranged to connect a second supply voltage and the output terminal, and a control means adapted to providing a voltage depending on the output voltage of the amplifier, on the one hand, to the gate of the first switch and, on the other hand, when the current flowing through the first switch reaches a predetermined threshold, to the gate of the second switch.

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Claix, France

Christophe Bernard