Active-RC filter with compensation to reduce Q enhancement
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United States of America Patent
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Jul 11, 2006
Grant Date -
Feb 23, 2006
app pub date -
Aug 17, 2004
filing date -
Aug 17, 2004
priority date (Note) -
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Abstract
An active filter with compensation to reduce Q-enhancement is disclosed. The filter may include a first amplifier and a second amplifier coupled to the first amplifier. The second amplifier having a negative feedback loop including a buffer having a plurality of compensation resistors. The compensation resistors may each have a value that results in the biquad filter having substantially zero Q-enhancement. The biquads may cascaded to form higher order filters.
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