Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2011-08-02
2011-08-02
Ngo, Chuong (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S671000
Reexamination Certificate
active
07991820
ABSTRACT:
The ONE STEP BINARY SUMMARIZER is a digital logic circuit. It is used for summarizing two binary numbers. It contains one Function Generator Module and one or more SUMMARIZER Units. For subtraction it is subtracting Register “A” from Register “B” and Register “B” from Register “A”. The two subtraction and one addition operations are executed simultaneously. The Function Generator Module determines the actual correct operation, (addition or subtraction) and selects the correct results for the resultant operand. The circuit utilizes the subtraction-by-carry method; therefore the subtraction operation does not require any presorting, complementary operations, iterative additions, temporary storage, and multiple instruction sets, etc. The logic-flow is similar, the operational speed is identical for the addition and subtraction operations; and therefore, it is a true Time Symmetrical circuit. It is independent from the initial operation selection, the signs and magnitudes of the input operands.
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