Übersicht:Zwei Bandpaßfilter mit neuartigen CCD-Resonatoren wurden in Doppelpolysilizium-Gate NMOS-Technologie hergestellt. Die Funktion und experimentellen Ergebnisse eines Tschebyscheff-Bandpasses mit 3,1 % relativer Bandbreite und des vollintegrierten Signalfilters (B", (3 dB) = 8 · 10~4) für Kanalumsetzer werden erläutert. Die besonderen Vorteile solcher Filter sind die stabile Mittenfrequenz -unabhängig von Fertigungstoleranzen -und die Bestimmung der Bandbreite ausschließlich durch Kapazitätsverhältnisse. CCD-Resonatoren eignen sich daher besonders für die monolithische Integration schmaler Bandpässe bei höheren Frequenzen.Abstract: Two band-pass filters with novel CCD resonators were realized in double-polysilicon-gate NMOS technology. The operation and experimental results are discussed for a Chebyshev band-pass with a relative 3 dB-bandwidth of 3.1 % and for the fully selfcontained signalfilter for FDM channel modems with a 3 dB-bandwidth of 97 Hz at 131.85 kHz. The special advantages of such filters are the extremely stable center frequency and a bandwidth independently controlled by a capacitance ratio. Therefore CCD resonators are ideal modules for the monolithic implementation of narrow band-pass filters at higher frequencies.Für die Dokumentation: Monolithisch integriertes Filter / analoges Abtastfilter / CCD / rekursives Filter / Bandpaß / Resonator
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