Boots – shoes – and leggings
Patent
1992-07-27
1994-08-16
Nguyen, Long T.
Boots, shoes, and leggings
36472410, G06F 1531
Patent
active
053392647
ABSTRACT:
A finite impulse response (FIR) digital filter (100, 170, 175, 180) incorporates both symmetric and transposed structures in a configuration that suites ASIC implementation. The filter coefficients can be arranged in ascending order to implement coefficient block floating point, or in descending order. To further facilitate coefficient block floating point, filter coefficients are chosen so that each cell has an exponent value equal to or greater than that of a preceding cell. A right shift is provided between adjacent cells to equate the exponent value of a sum output of a preceding cell with that of the succeeding cell. Variable decimation is provided by downloading appropriate filter coefficient and adjusting a decimation forward clock. Multiple channels can also be accommodated.
REFERENCES:
patent: 4263593 (1981-04-01), Dagostino et al.
patent: 4344149 (1982-08-01), van de Meeberg et al.
patent: 5081604 (1992-01-01), Tanaka
patent: 5206821 (1993-04-01), Young et al.
1992 IEEE International Symposium on Circuits and Systems, A Floating Point FIR Filter With Reduced Exponent Dynamic Range, Horrocks et al., May 10-13, 1992, 1808-1811.
Multirate Digital Signal Processing, Ronald R. Crochiere et al., Prentice-Hall, Inc., Englewood Cliffs, N. J., (1983), 74, 77.
Said Ahmed
Seckora Michael
Griffith Boulden G.
Nguyen Long T.
Tektronix Inc.
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