Method and apparatus for digital multiplication based on sums an

Details Method and apparatus for digital multiplication based on sums an Method and apparatus for digital multiplication based on sums an

1993-07-06

1995-03-28

Mai, Tan V.

Boots, shoes, and leggings

364754, G06F 752

Patent

active

054023696

ABSTRACT:
A method and apparatus is disclosed for digital multiplication based on sums and differences of finite sets of powers of two. It is observed that for a given multiplicand signal A, multiples of the form A.multidot.P/Q can be defined by adding or subtracting term signals when each term signal (T.sub.i,T.sub.j) is selectively made representative either of the multiplicand (A) multiplied by a power of two (T=A*2.sup.-i) or representative of a nullity (T=0*A). A mapping unit is provided for controlling responsive barrel shifters and for controlling one or more responsive adder/subtractor units so that the resultant system has a transfer function equivalent to that of an n-bits by m-bits multiplier.

REFERENCES:
patent: 4864529 (1989-09-01), Shah et al.
patent: 5001663 (1991-03-01), Parulski et al.
patent: 5117385 (1992-05-01), Gee
patent: 5243552 (1993-09-01), Asakura

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