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Old 5th April 2006, 01:14 PM   #1
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Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default An even better Bessel filter

thankfully I had not yet thrown out the Feb 16th issue of EDN -- Troy Murphy of Analog Devices describes an 8th order Bessel filter design with THD+N in the vicinity of 0.0006% -- this particular design is for a 30kHz LPF. The design uses low value resistors and low noise opamps to achieve this TDH+N.

put Troy Murphy into the EDN search engine to see the article.
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