Dynamic filter

Details Dynamic filter Dynamic filter

1996-04-02

1997-12-23

Mai, Tan V.

Boots, shoes, and leggings

G06F 1710

Patent

active

057012610

ABSTRACT:
Difficulty is experienced where filters are required to provide a high level of noise reduction and a fast step response in systems where a large input step in comparison to the final resolution may occur. A suitable filter comprises a variable length averaging filter, an averaging sample counter, the count of which is reduced by a predetermined factor when the count reaches a maximum value, and a spike counter, the count of which is incremented when the difference between an input sample and the current filter output exceeds a predetermined value, the sample count being reset to 1 when the spike count reaches a predetermined value, the filter output being otherwise maintained at the previous output.

REFERENCES:
patent: 4970637 (1990-11-01), Sato
patent: 5172334 (1992-12-01), Hienerwadel

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