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:
Apr. 16, 2002
Filed:
Jan. 18, 2000
Applicant:
Inventor:
Miaochen Wu, Acton, MA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 7/44 ;
U.S. Cl.
CPC ...
G06F 7/44 ;
Abstract
By sampling at six times the carrier frequency cosine and sine multiplication circuits are found to be constructable from simple shift and inversion circuit. Shifting and inversion are controlled by means of a simple finite state machine or other circuits cycling through a six cycle periodic sequence.