Eads Secure Networks

Stéphane Doucet

Michel Robbe

Hervé Guegnaud

In order to convert a complex analog signal into a complex digital signal in an analog-digital conversion device having two channels, I and Q respectively, in quadrature, each comprising an input and an associated output, each output being fed back onto said associated input so as to form a first and a second feedback loops each comprising a digital-analog converter, the device comprising a complex filter with a first stage and a last stage, after sampling (), a signal integration is performed in a first stage () of the filter without introducing any substantial delay. Then, an integration is performed in the last stage () of the filter. A substantial delay () is then introduced and the output signal of the last stage is converted into a digital signal over several bits. The digital signal is injected into the feedback loop () of said channel and the digital signal is converted into a feedback signal.

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Paris, France

Stéphane Doucet