Stmicroelectronics S.a.

Centre National De La Recherche Scientifique

Universitë De Bordeaux

Institut Polytechnique De Bordeaux

Thales

Stmicroelectronics (grenoble 2) Sas

Centre National Detudes Spatiales

Yann Deval

Didier Belot

Jean-Baptiste Begueret

Eric Kerherve

Francois Rivet

Patrick Garrec

Richard Montigny

Franck Badets

Moustapha El Hassan

Nicolas Regimbal

Thierry Taris

Hervé Lapuyade

François Rivet

Dominique Dallet

André Mariano

Alexandre Shirakawa

Yoan Veyrac

Michel Pignol

Pierre Jarry

Alexandre Augusto Shirakawa

Nathalie Deltimple

Pierre-Olivier Lucas De Peslouan

Cédric Majek

Andréia Cathelin

Laurent Leyssenne

Claude Neveu

Olivier Mazouffre

Vincent Lagareste

Pierre Melchior

An analog signals generating device comprises a current pump controlled by a control code generated by a module for calculating the digital code with shaping of noise. The calculation module receives as input a digital signal representative of the analog signal to be generated and comprises at least one quantizer and a quantization error compensating stage. The current pump comprises two groups of at least one electric current generator and two groups of at least one switching means, the switching facilities being controlled by the control signal and causing the electric currents to flow between the electric current generators and the inputs of a differential amplifier exhibiting a predominantly capacitive input impedance and connected in series between the two groups of switching means.

Device for generating analogue signals and associated use

The system has: a set of at least two electric current generators, at least one capacitor and activation/deactivation devices for the electric current generators; the electric current generator being connected in parallel with one another and the capacitor being connected in series with the electric current generators, the activation/deactivation devices controlling the generators by a digital stream allowing control of the intensity of the electric current entering the capacitor and generating a trapezoidal voltage signal at the terminals of the capacitor, the analog signal being reconstructed through interpolation of the trapezoidal signal.

System for generating an analogue signal

A method for generating a radio frequency signal, wherein a signal to be transmitted is decomposed into a weighted sum of periodic basic signals of different frequencies.

Radio frequency signal transmission method and device

A device for generating a signal, including: a balun; and a circuit capable of summing up, on a first access terminal of the balun, currents representative of signals received on first input terminals of the device, and on a second access terminal of the balun, currents representative of signals received on second input terminals of the device.

Signal generation device

Continuous time analog/digital converter, comprising a sigma delta modulator (MSD) configured to receive an analog input signal (x(t)) and comprising high-pass filtering means (MF) the chopping frequency of which is equal to half of the sampling frequency (Fs) of the quantization means (QTZ) of the modulator (MSD).

Continuous time analogue/digital converter

A fractional frequency divider including a frequency division unit for generating a reduced frequency timing signal having j pulses for every k pulses of an original timing signal, wherein j and k are each integers; and phase correction circuitry adapted to selectively shift each jth pulse of the reduced frequency timing signal by a first fixed time period.

Fractional frequency divider

A filtering circuit with BAW type acoustic resonators having at least a first quadripole and a second quadripole connected in cascade, each quadripole having a branch series with a first acoustic resonator of type BAW and a branch parallel with each branch having an acoustic resonator of type BAW, the first acoustic resonator having a frequency of resonance series approximately equal to the frequency of parallel resonance of the second acoustic resonator, the branch parallel of the first quadripole having a first capacitance connected in series with the second resonator and, in parallel with the capacitance, a first switching transistor to short circuit the capacitance.

Bulk acoustic wave resonator filter being digitally reconfigurable, with process

Device for generating a signal of parametrizable frequency comprising a phase locked loop including a generator of a reference signal, a phase-frequency comparator comprising a first input for receiving the reference signal, an oscillator controlled on the basis of the result output by the phase-frequency comparator, a fractional divider coupled between an output of the oscillator and a second input of the phase-frequency comparator, and a selector selectively linking an input of the oscillator either with an input of the generator, or with the output of the oscillator as a function of the multiplication ratio of the fractional divider.

Device and method for generating a signal of parametrizable frequency

A bulk acoustic wave resonator has an adjustable resonance frequency. A piezoelectric element is provided having first and second electrodes. A switching element is provided in the form of a MEMS structure which is deformable between a first and second position. The switching element forms an additional electrode that is selectively disposed on top of, and in contact with, one of the first and second electrodes. This causes a total thickness of the electrode of the resonator to be changed resulting in a modification of the resonance frequency of the resonator.

Bulk acoustic wave resonator with adjustable resonance frequency and use of such a resonator in the field of telephony

Continuous time analogue/digital converter, comprising a sigma delta modulator (MSD) configured to receive an analogue input signal (x(t)) and comprising high-pass filtering means (MF) the chopping frequency of which is equal to half of the sampling frequency (Fs) of the quantization means (QTZ) of the modulator (MSD).

A radiofrequency signal power amplification circuit may include a signal input for receiving the radiofrequency signal, an amplification stage coupled to the signal input and having at least one power transistor, a biasing stage for delivering a bias voltage to the amplification stage, and a processing stage. The processing stage may include a processing input coupled to the signal input, a processing output for delivering a bias current modulated at least in amplitude to the biasing stage, and an amplitude modulator coupled between the processing input and the processing output and configured to determine an envelope signal representative of the envelope of the radiofrequency signal, for modulating the amplitude of the envelope signal based on a variable voltage setpoint and for generating the amplitude-modulated bias current based on the modulated envelope signal.

Radiofrequency signal power amplification method and device

A device for extracting a clock signal from a baseband serial signal, includes an injection-locked oscillator (), a phase-locked loop () including a digital phase detector (). The oscillator () includes a digital input for controlling the value of its natural frequency, and the phase-locked loop () includes a counting circuit () aggregating the relative values of the digital signal supplied by the digital phase detector () and supplying a control signal in digital form for the oscillator ().

Clock extraction device with digital phase lock, requiring no external control

A reconfigurable power amplifier includes at least one amplification circuit (E, E), and a circuit () for controlling the amplification circuit so as to adapt its operation according to an applied input signal (RF). The circuit for controlling includes a circuit () for modifying the compression point of the amplification circuit and for adapting the gain of the amplification circuit in such a manner as to increase the power added efficiency of the circuit for the modified compression point.

Reconfigurable power amplifier and use of such amplifier for making a multi-standard amplification stage for mobile phone communications

A device processes a received radio signal. Circuitry formulates voltage samples of the radio signal. Analog processing of those samples is performed. Then, digital processing is performed on the output of the analog processing. The circuitry for formulating voltage samples is configured to ensure a processing of the samples prior to the digital processing.

Method and device for the analog processing of a radio signal for a radio frequency receiver

A method is for reducing a DC component of an input signal transposed into baseband and being generated by a first frequency transposition stage starting from an initial signal and from a transposition signal. The method includes amplifying the transposed input signal in a first amplifier. The first amplifier receives at a DC offset compensation input, a compensation signal extracted from an output signal of a second amplifier subjected to a compensation of a offset DC voltage of the second amplifier. The method also included alternating between receiving at an input of the second amplifier, a first auxiliary signal from an auto-transposition of a transposition signal in a second frequency transposition stage and a second auxiliary signal from a transposition of the initial signal in the second frequency transposition stage with the transposition signal.

Method and device for the reduction of the DC component of a signal transposed into baseband, in particular in a receiver of the direct conversion type

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Bordeaux, France

Yann Deval