Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2007-03-13
2007-03-13
Tan, Vibol (Department: 2819)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S713000, C708S707000, C708S708000, C708S709000, C708S710000, C326S038000, C326S039000
Reexamination Certificate
active
10968554
ABSTRACT:
A function block allows a multiplier and a multi-input multiplexer to be realized with a small number of blocks. A logical function generator generates a logical output signal from first to fourth logical inputs thereof according to a logical function selected from a plurality of 4-input/1-output logical functions depending on configuration data. A 4-2 carry block generates a 4-2 carry output from the second to fourth logical inputs. A first signal is generated from at least the logical output, a second signal from at least the first logical input, a third signal from at least a 4-2 carry input signal, and a fourth signal from at least the 4-2 carry input signal. A multiplexer selects one of the second and third signals depending on the first signal to produce a carry output signal. An exclusive OR circuit produce an exclusive-ORed result from the logical output and the fourth signal.
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European Search Report for EP application No.: EP 02 013 978.8-2215 dated Dec. 9, 2006.
Foley & Lardner LLP
NEC Corporation
Tan Vibol
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