Method and apparatus for reducing jitter in a digitizer or other

Details Method and apparatus for reducing jitter in a digitizer or other Method and apparatus for reducing jitter in a digitizer or other

1986-04-30

1988-12-13

Lall, Parshotam S.

Boots, shoes, and leggings

36472401, 375118, G05B 1304

Patent

active

047915927

ABSTRACT:
A method of digitially filtering unfiltered values from a transducer to eliminate jitter compares a new unfiltered value against the previous filtered value. If the difference exceeds a selected amount the unfiltered amount is taken as and replaces the filtered value. If the difference is less than the selected amount then the new filtered amount is calculated from sliding percentages of the old filtered value added to the new unfiltered value. The two percentages add to one hundred percent, and linearly reflect what percentage the difference is of the selected amount.

REFERENCES:
patent: 4184129 (1980-01-01), Macchi nee Danjon et al.
patent: 4255617 (1981-03-01), Carau, Sr. et al.
patent: 4514855 (1985-04-01), Lang et al.
patent: 4556956 (1985-12-01), Dickenson et al.
Selected Portions of an Operating Manual for HP Model 9107A Calculator Digitizer, HP Part Number 09107-90000, Apr., 1971, pp. 54-56, 61 & 62 out of total pp. 54-77.

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