Thales

Christophe Flouzat

Jean-Luc De Gouy

Jean-Michel Hode

Vincent Jahier

Michel Giraudo

Marie-Pierre Dussauby

The invention relates to a wireless transmitting and receiving module including a radiofrequency module filtering and amplifying the wireless signals received, a high intermediate frequency module transposing the wireless signals received to a high intermediate frequency, the transpositions being carried out by mixing of the wireless signals with signals of known frequency generated by local oscillator modules, and a low intermediate frequency module transposing the wireless signals received to a low intermediate frequency. In particular, the invention applies to the radiocommunication software modules that can receive and/or transmit on the broad band, that is to say in a frequency range from 30 MHz to 3 GHz.

Radioelectric transmission and reception module mainly intended for broad-band radio-communications

The disclosure pertains to continuous-time filtering. More particularly, it relates to filtering in a feedback control loop, for example in a sigma-delta (&#x3a3;&#x394;) modulator. The making of a filter for this type of application comes up against a major problem linked to the relativity between the amplitude and phase responses. This limits the possibilities of choice in order to take steps against the instability of the loop. A continuous-time filter with minimum phase variation carries out the bandpass integration of the signal presented at its input. The making of the continuous-time filter as a bandpass integrator raises the problem of achieving a compromise between gain variations and phase variations close to the &#x2212;1 critical point, This compromise must lead to the stability of the loop. This problem is resolved by using a continuous-time bandpass integrating filter comprising at least one resonance device with minimum phase variation.

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Fontenay aux Roses, France

Christophe Flouzat