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. 20, 1998
Filed:
Nov. 04, 1996
Luis A Bonet, Austin, TX (US);
David Yatim, Austin, TX (US);
James W Girardeau, Jr, Austin, TX (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A digital signal processor (10) includes a primary data bus (12), a primary instruction bus (14), a program control unit (16), an arithmetic unit (18), and a multiplier (20). Within the program control unit (16), multi-instruction words are issued from program memory (22) to the primary instruction bus (14). These multi-instruction words allow both logical and arithmetic instructions to be performed simultaneously. The arithmetic unit (18) includes a secondary data bus (44) which couples the arithmetic unit to the accumulator (34). The arithmetic unit (18) also includes a barrel shifter (48) having sign extension to reduce the number of operations required to shift data. The arithmetic logic unit (32) further includes complex arithmetic functions resulting in fewer operations per instruction and a multiplier (50) which is used for filtering operations in digital filtering and by the arithmetic unit (18).