The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 1990
Filed:
Apr. 21, 1988
Applicant:
Inventor:
Larry R Tate, Flemington, NJ (US);
Assignee:
Harris Semiconductor Patents Inc., Melbourne, FL (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364760 ;
Abstract
A truncated product partial canonical signed digit (PCSD) multiplier is disclosed for use in a finite impulse response (FIR) digital filter. Each multiplier quantity is coded as two non-zero signed digits in an 8-bit word. Each non-zero signed digit is recoded into a four bit nibble for application to the multiplier. Each partial product output of the multiplier is truncated from 16 to 11 bits. The multiplier operations are performed in the sequence shift right, truncate, one's complement, add partial products and, according to the output of a logic control circuit, add one into an appropriate order.