Carry look ahead circuit

Details Carry look ahead circuit Carry look ahead circuit

1993-09-03

1995-06-13

Malzahn, David H.

Boots, shoes, and leggings

G06F 750

Patent

active

054249724

ABSTRACT:
A carry look ahead circuit includes a first circuit for generating a logical sum of inputs, a second circuit for generating a logical product of the inputs, and a selection circuit for selecting either one of an output of the first circuit and an output of the second circuit in accordance with a carry signal from a lower figure to produce the selected output as a carry signal. Consequently, the number of circuit elements can be reduced greatly to configure the high speed and low power consumption carry look ahead circuit.

REFERENCES:
patent: 4439835 (1984-03-01), Best et al.
patent: 4831578 (1989-05-01), Bui
patent: 5027311 (1991-06-01), Zion
patent: 5027312 (1991-06-01), Knauer
patent: 5040139 (1991-08-01), Tran
patent: 5272662 (1993-12-01), Scriber et al.
Baifukan "Design of CMOS VLSI", 1989, pp. 217-220.

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