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:
Sep. 22, 1998
Filed:
Jun. 23, 1997
Applicant:
Inventor:
Dror Halahmi, Tel Aviv, IL;
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395709 ; 364153 ;
Abstract
DSP size and cost can be reduced by shrinking the program ROM and opcode interpreter (e.g., PLA) to store and recognize only #OC unique opcodes from within the total available opcodes for the DSP. The minimum opcode length M is the smallest integer satisfying 2.sup.M .gtoreq.#OC. It is preferred to choose an opcode length M'>M so that the total chip area occupied by the ROM plus PLA is minimized without loss of chip performance. By converting 24 bit opcodes to 16 bit opcodes for M=12 and M'=16, the combined program ROM and PLA areas are reduced by .about.1/3rd and the overall DSP is significantly smaller.