TRANSDUCTEUR PERFECTIONNE POUR FILTRE A ONDES DE SURFACE A FONCTION DE TRANSFERT ASYMETRIQUE ET FILTRE COMPORTANT UN TEL TRANSDUCTEUR

TRANSDUCTEUR PERFECTIONNE POUR FILTRE A ONDES DE SURFACE A FONCTION DE TRANSFERT ASYMETRIQUE ET FILTRE COMPORTANT UN TEL TRANSDUCTEUR

An input transducer for surface wave filters having an asymmetrical transfer function comprises two pairs (5 and 6) of interdigital combs disposed side by side on the same piezoelectric substrate staggered by one quarter of the acoustic wavelength, one having a symmetrical transfer function and the...

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Bibliographische Detailangaben
1. Verfasser: JEAN MICHEL AUTRAN ET BERNARD EPSZTEIN
Format: Patent
Sprache:fre
Schlagworte:
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:An input transducer for surface wave filters having an asymmetrical transfer function comprises two pairs (5 and 6) of interdigital combs disposed side by side on the same piezoelectric substrate staggered by one quarter of the acoustic wavelength, one having a symmetrical transfer function and the other an anti-symmetrical transfer function. The asymmetrical transfer function filter is obtained by summing the two acoustic waves generated by such an input transducer in a wide band output transducer.