Registers – Transfer mechanism – Traveling pawl
Patent
1975-07-03
1976-11-23
Malzahn, David H.
Registers
Transfer mechanism
Traveling pawl
G06F 750
Patent
active
039938913
ABSTRACT:
A high speed parallel digital adder/subtracter employing a specially chosen combination of "conditional" and "look-ahead" approaches which permits economically achieving high speed operation even for input operands containing relatively large numbers of digits. In a preferred embodiment, simultaneously produced look-ahead carry and carry-not signals are generated and employed to select particular ones of simultaneously generated conditional sums for one or more operand digits so as to simultaneously provide resulting digital sums which properly represent the sum of the input operands.
REFERENCES:
patent: 3316393 (1967-04-01), Ruthazer
patent: 3566098 (1971-02-01), Kono
patent: 3697735 (1972-10-01), Hanson
patent: 3700875 (1972-10-01), Saenger et al.
patent: 3805045 (1974-04-01), Larsen
Beck Gary Randall
Quave Ronald Carlos
Burroughs Corporation
Cass Nathan
Malzahn David H.
Peterson Kevin R.
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