The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2010
Filed:
Sep. 19, 2005
Michel Robbe, Conflans Ste Honorine, FR;
Stéphane Doucet, Paris, FR;
Hervé Guegnaud, Maurepas, FR;
Eads Secure Networks, Montigny le Bretonneux, FR;
Abstract
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.