Active-RC filter with compensation to reduce Q enhancement

Details Active-RC filter with compensation to reduce Q enhancement Active-RC filter with compensation to reduce Q enhancement

2006-07-11

2006-07-11

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S558000

Reexamination Certificate

active

07075364

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.

REFERENCES:
patent: 4057766 (1977-11-01), Lee
patent: 5117199 (1992-05-01), Wang et al.
patent: 6373332 (2002-04-01), Kawai
patent: 6930544 (2005-08-01), Yokoyama
patent: 02001177063 (2001-06-01), None

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