IMPROVED RC FILTER POLE FOR FM TRANSMITTERS

An RC filter pole (R 1 , C 1 ) for FM transmitters converts an internal 2-pole Bessel-type filter (R 1 , C 1 , C 2 ) on a chipset (BH141XS/F) by adding an external filter function to create a 3-pole composite filter with improved roll-off characteristics. The design methodology and specific low cost...

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Bibliographic Details
Main Author GLISSMAN, JOHN
Format Patent
LanguageEnglish
French
German
Published 18.04.2007
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:An RC filter pole (R 1 , C 1 ) for FM transmitters converts an internal 2-pole Bessel-type filter (R 1 , C 1 , C 2 ) on a chipset (BH141XS/F) by adding an external filter function to create a 3-pole composite filter with improved roll-off characteristics. The design methodology and specific low cost circuit implementation of the composite filter effectively minimizes the impact of signal degradation on overall link performance.
Bibliography:Application Number: EP20050769539