Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Alexandre Siligaris

Clement Jany

Jose-Luis Gonzalez Jimenez

Cédric Dehos

Frederic Hameau

Cedric Dehos

Mykhailo Zarudniev

Baudouin Martineau

Laurent Dussopt

José-Luis Gonzalez Jimenez

Frédéric Hameau

Clément Jany

Pierre Vincent

Etienne Antide

A generator of a frequency modulated radar signal includes a generator of a periodic signal frequency modulated over a part Tof a period T, corresponding to a square signal of which the frequency varies linearly in a first frequency band Bof central frequency f; an oscillator generating a sinusoidal signal of frequency f>fand included in a second frequency band B>Band corresponding to the linear variation of the frequency of the radar signal; and means coupled to an electrical supply input of the oscillator such that they generate a voltage for supplying the oscillator at the frequency of the frequency modulated periodic signal.

Generator of a frequency modulated radar signal

A radar measuring device including at least:

Radar detection device

A carrier recovery system for a receiver of a phase-modulated signal N-PSK, the system including a first pre-conditioning circuit of the signal received (S(t)), with the pre-conditioned signal (SP(t)) having a component, non-modulated in phase, at the frequency N&#x192;where &#x192;is the carrier used for the modulation N-PSK, and a carrier regeneration circuit to regenerate two sinusoidal signals in quadrature at the frequency &#x192;, with these signals being phase locked with respect to said non-modulated component in phase of the pre-conditioned signal.

Carrier recovery analog system for a receiver of a N-PSK signal

Device for adjusting the locking of an injection locked frequency multiplier, including:

Device for adjusting the locking of an injection locked frequency multiplier

A frequency synthesis device with high multiplication rank, including a base frequency generator generating two first base signals of square shape of same frequency and opposite to each other, a first synthesis stage including two first switching power supply oscillators, of which the power supplies are respectively switched by the two first base signals, a second synthesis stage including a second switching power supply oscillator of which the supply is switched by a combination of the output signals of the two first oscillators, the output of the second switching power supply oscillator being filtered by a frequency discriminator circuit realized with an injection locked oscillator.

Frequency synthesis device with high multiplication rank

Radiofrequency communication device comprising at least one TORP signal generation circuit, the TORP signal corresponding to oscillations trains periodically repeated at a frequency Ffor which the oscillation frequency is F&#x3e;Fand for which each oscillations train lasts for a duration of less than 1/F, and at least one multiplier circuit for which an input is coupled to an output of said at least one TORP signal generation circuit such that it is capable of multiplying the TORP signal with a baseband signal comprising at least one of information intended to be transmitted by the radiofrequency communication device and a radiofrequency signal intended to be received by the radiofrequency communication device.

Radiofrequency communication device using a TORP signal

An ultra-wideband radio frequency transmission system capable of receiving a first signal with discrete levels, and including: a voltage-controlled oscillator capable of supplying a first oscillating signal including an oscillating circuit powered by a power supply circuit comprising at least one first current source controlled by the first signal with discrete levels or a second signal with discrete levels obtained from the first signal with discrete levels; a mixer capable of receiving the first oscillating signal and of supplying a second oscillating signal equal to the first oscillating signal multiplied by a gain which depends on the first signal with discrete levels or on a third signal with discrete levels obtained from the first signal with discrete levels; and an antenna or an electromagnetic coupling device capable of transmitting a radio frequency signal based on the second oscillating signal.

Ultra wideband radio frequency transmission system

A frequency synthesis device, including: a first generator configured to generate a periodical signal with a frequency f; a second generator, coupled to the first generator and generating from the signal with a frequency fa signal Scorresponding to a train of oscillations with a frequency substantially equal to N&#xb7;f, with a duration lower than T=1/fand periodically repeated at the frequency f; a third generator generating, from the signal S, m periodical signals Sto Swith frequency spectra each include a main line with a frequency fcorresponding to an integer multiple of f, with 1&#x2266;i&#x2266;m, the third generator operating as a band-pass filter applied to the signal Sand discarding from the frequency spectra of each of the periodical signals Sto Slines other than the main line with a frequency f.

Frequency synthesis device and method

A device for generating at least one frequency-stable periodical signal, including: a generator configured to generate at least one first periodical signal with frequency spectrum that includes at least two lines at different frequencies fand f; a first switchable injection-locked oscillator configured to receive at an input the first periodical signal and to be locked, in a first state, to the frequency f, and in a second state, to the frequency f, as a function of a value of at least one control signal applied at the input of the first switchable injection-locked oscillator.

Device for generating frequency-stable signals with switchable injection-locked oscillator

In the field of millimeter band transmitting/receiving systems for a high-speed contactless transmission, an architecture is provided with a common processing circuit supplying modulation signals and a plurality of transmitting/receiving integrated circuits, all identical to one another, receiving these signals, and also a common clock. The transmitting/receiving integrated circuits each comprise: an oscillator locked with the clock signal to produce a carrier frequency, a transmit channel comprising a first controllable phase shift circuit, a frequency transposition to the carrier frequency, and a power amplifier, a receive channel comprising a low noise amplifier, a frequency transposition from the carrier frequency, and a second controllable phase shift circuit. An antenna is associated with each transmitting/receiving circuit.

Millimeter band transmitting/receiving system

A frequency synthesis device including: a first generator configured to generate a periodic signal of frequency f; a second and third generator, coupled with the first generator and configured to receive as an input the periodic signal of frequency fand to generate a signal Scorresponding to a train of oscillations of frequency substantially equal to N&#xb7;f, of a time less than T=1/fand repeated periodically at the frequency f, where N is a whole number greater than 1; and a fourth generator configured to generate, from the signal S, a periodic signal wherein a frequency spectrum includes a primary line of frequency f=(N+i)&#xb7;f, where i is a whole number.

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Grenoble, France

Alexandre Siligaris