Circuit and method for determining multiplicative inverses with

Details Circuit and method for determining multiplicative inverses with Circuit and method for determining multiplicative inverses with

1994-02-02

1998-10-06

Mai, Tan V.

Boots, shoes, and leggings

G06F 752

Patent

active

058187448

ABSTRACT:
Digital circuits determine multiplicative inverses using look-up tables which, in response to an address signal, provide a signal indicating a multiplicative inverse. The look-up tables store values indicating inverses for numbers between 1 and 2. The circuit factors a value to be inverted as product a power of two and a factor between 1 and 2. An address signal indicating the factor is applied to the look-up table, and the look-up table provides a signal which indicates the inverse of the factor. The signal provided by the look-up table is then converted to the proper scale for the exponent N. Factoring and conversion may be accomplished with logical shifts so that no multiplier is required. The look-up table may be compressed by not storing bits of inverses, which are constant or only change once within the range of the look-up table and by only storing look-up values for every other number within the range of the look-up table. A code bit in each look-up table value permits generation of correct inverses for values not stored.

REFERENCES:
patent: 3859512 (1975-01-01), Ritzinger
patent: 4823301 (1989-04-01), Knierim
patent: 4917443 (1990-04-01), Kramer et al.
patent: 4991132 (1991-02-01), Kadota
patent: 5012438 (1991-04-01), Yamaguchi
patent: 5176429 (1993-01-01), Junichi et al.
patent: 5193886 (1993-03-01), Gloceri
patent: 5193887 (1993-03-01), Bleckman et al.

Affiliated with

Also associated with

Rating

Circuit and method for determining multiplicative inverses with does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit and method for determining multiplicative inverses with , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit and method for determining multiplicative inverses with will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-86293