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Uguen
Bernard Uguen, Servon Sur Vilaine FR
| Patent application number | Description | Published |
|---|---|---|
| 20110163905 | Method and System for Aiding Environmental Characterization by Ultra-Wideband Radiofrequency Signals - The invention relates to environmental characterization on the basis of an Ultra Wide Band (UWB) radiofrequency communication network. Pulses are emitted and the waveform received is compared with predicted waveforms corresponding to well determined interactions between the wave and its environment. The comparison is done by searching for maximum temporal correlation. The interactions can be notably reflections of the wave on walls or obstacles. The deformations are very dependent on the nature of the materials and directions in which the pulses are emitted and received. If predicted waveforms are stored for various pairs of direction of emission and of reception, it is possible through these correlation operations to find where a wall which gave rise to a reflection is situated. | 07-07-2011 |
Daniel Uguen, Strasbourg FR
Emeric Uguen, Domjean FR
| Patent application number | Description | Published |
|---|---|---|
| 20080298089 | Converter Circuit with Forward and Backward Control - The present invention relates to a converter circuit and a conversion method for converting an input signal of a first value to an output signal of a second value based on a switched operating mode, wherein an output feedback loop ( | 12-04-2008 |
| 20110109537 | BACKLIGHT CONTROL FOR DISPLAY DEVICES - A display device backlight comprises at least one LED and a control circuit for controlling the brightness of the LED, wherein the control circuit comprises a drive transistor for driving a current through the LED and a pulse width modulation circuit for controlling the timing of operation of the drive transistor. A compensation circuit provides a first boost current to the gate of the drive transistor during a rising edge of the current profile and provides a second boost current to the gate of the drive transistor during a falling edge of the current profile. This arrangement improves the switching response of the drive transistor by providing boost currents to/from the gate of the drive transistor during the rising and falling edges of the current through the drive transistor (in response to steps in the PWM control signal). | 05-12-2011 |
Emeric Uguen, La Fresnaye Au Sauvage FR
| Patent application number | Description | Published |
|---|---|---|
| 20080265671 | Voltage Converter for Converting a Voltage to Multiple Output Voltages and Method of Operating Said Voltage Converter - The invention relates to an voltage converter for converting a voltage to multiple output voltages, comprising a first switching circuit (SO) connected to an inductive energy storage element (L) for allowing and interrupting a current flow through the inductive energy storage element (L); at least two second switching circuits (S | 10-30-2008 |