Method and apparatus for conversion of radio frequency (rf)...

Details Method and apparatus for conversion of radio frequency (rf)... Method and apparatus for conversion of radio frequency (rf)...

H - Electricity

03

D

H03D 7/16 (2006.01) H03D 7/14 (2006.01) H04B 1/28 (2006.01)

Patent

CA 2456930

There is a need for an inexpensive, high-performance, fully-integrable, multi- standard transceiver. The invention provides a topology that satisfies this need, consisting of: an active mixer, followed by a high pass filter, and a passive mixer. The input signal is modulated up, or demodulated down, using a pair of complementary, aperiodic mixing signals. The use of aperiodic mixing signals allows a fully-integrated transceiver to be built. Several embodiments of the active mixer are also presented, including those having electrically- adjustable performance and allowing multiple RF signal inputs. This allows the topology of the invention to be employed in multi-band, multi-frequency applications, while still providing high performance.

Selon l'invention, un émetteur-récepteur peu coûteux, efficace, entièrement intégrable et multinorme est nécessaire. L'invention concerne une topologie qui répond à ce besoin, qui consiste en un mélangeur actif, suivi d'un filtre passe-haut et un mélangeur passif. Le signal d'entrée est modulé vers le haut ou démodulé vers le bas à l'aide de deux signaux mélangeurs apériodiques complémentaires, dont l'utilisation permet de construire un émetteur-récepteur entièrement intégré. L'invention concerne plusieurs modes de réalisation de mélangeurs actifs, notamment ceux dont le fonctionnement est réglable électriquement et qui autorisent des entrées de signaux RF multiples. La topologie selon l'invention peut ainsi servir dans des application multibande, multifréquence et être simultanément d'une grande efficacité.

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