Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2006-11-21
2006-11-21
Mai, Tan V. (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reexamination Certificate
active
07139789
ABSTRACT:
In association with a circuit for adding binary numbers, it is often useful to increment the sum by a value of 1, for example on a conditional basis. Each of the combined adder and incrementer circuits embodying the invention also provides an output indicating whether a CarryOut signal resulted from the incrementing operation, or whether the CarryOut signal resulted from the addition. The preferred embodiments utilize prefix-type adder circuits using a single carry chain. Alternate embodiments generate a CarryOut signal as a function of the incrementing operation, using either generate and propagate signals or from generate and kill signals from the carry chain.
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Mai Tan V.
Sterne Kessler Goldstein & Fox PLLC
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