Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2006-03-21
2006-03-21
Malzahn, D. H. (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reexamination Certificate
active
07016926
ABSTRACT:
A method for implementing a low power and high-speed digital filter having reduced number of adders is disclosed. The method comprises the steps of determining vertical common CSD (Canonical Signed Digit) code words between corresponding CSD code words of adjacent filter coefficients, wherein a vertical common CSD code word in a highest level bit is set as a vertical common subexpression, expressing the vertical common CSD code words out of the CSD code words of each filter coefficient with the vertical common subexpression by shifting and delaying the vertical common subexpression, and synthesizing the expressed vertical common CSD code words of the filter coefficients.
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patent: 2002/0152251 (2002-10-01), Jang
Jang Young-Beom
Yang Se-Jung
F.Chau & Associates,LLC
Malzahn D. H.
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