Look-up table apparatus to perform two-bit arithmetic...

Details Look-up table apparatus to perform two-bit arithmetic... Look-up table apparatus to perform two-bit arithmetic...

2005-11-01

2005-11-01

Mai, Tan V. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

06961741

ABSTRACT:
A look-up table apparatus is provided for performing two-bit arithmetic operation including carry generation. The look-up table is modified to perform two concurrent combinatorial functions, or one function for an increased number of inputs. The look-up table can implement two full adders or subtractors, or two-bit counters, for example. One portion of the modified look-up table provides two bits of a sum output, and another portion of the modified table provides a fast carry out signal for application to a next stage of an adder/subtractor/counter.

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