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:
May. 13, 1997
Filed:
Mar. 08, 1995
Richard Simpson, Carlton, GB;
Erick Oakland, Zavalla, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A magnitude comparator employs plural layers of repeated circuits which are scalable to any size. The magnitude comparator indicates whether two multibit inputs are equal, and if not equal indicates if a first multibit input is greater than a second multibit input. A single bit comparator circuit receives a corresponding bit of the two multibit inputs. Each single bit comparator generates an A=B output equal to the exclusive NOR of the two inputs and an A>B output equal to the first input. The magnitude comparator includes at least one two bit comparator circuit disposed in at least one layer. Each two bit comparator circuit includes an A[0]=B[0] input, an A[0]>B[0] input, an A[1]=B[1] input and an A[1]>B[1] input. Each two bit comparator circuit generates an A=B output of an AND of signals received at the A[0]=B[0] and A[1]=B[1] inputs. Each two bit comparator circuit generates an A>B output equal to the A[1]>B[1] input if the A[0]=B[0] input is '1' and equal to the A[0]>B[0] input if the A[0]=B[0] input is '0'.