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:
May. 12, 1998
Filed:
Dec. 10, 1996
Herve Guegnaud, Maurepas, FR;
Michel Robbe, Conflans Sainte Honorine, FR;
Matra Communication, , FR;
Abstract
In order to process an input signal exhibiting a frequency modulation about an intermediate frequency, the demodulator includes a first mixer for producing a first signal exhibiting the frequency modulation about a transposition frequency lower than the intermediate frequency; a switched-capacitor phase-shifter receiving the first signal so as to produce a second signal exhibiting, with respect to the first signal, a phase-shift varying substantially linearly with frequency about the transposition frequency; two substantially identical low-pass filters receiving the second signal and the first signal respectively; and a second mixer for mixing the signals produced by the first and second low-pass filters, in order to deliver a baseband output signal.