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A new design of a fast barrel switch network

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2 Author(s)
Tharakan, G.M. ; Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA ; Kang, S.M.

A new implementation of the barrel switch with a speedup of 20-30% as compared to that of the prior barrel switch design is proposed in this paper. Domino CMOS is used to implement the design, which can shift or rotate 32-b data to the left or right by any number of bit positions between 0 and 31. The principles behind the design, timing and area comparisons, layout, simulation, and test results are presented. The area required for laying out the entire circuit was 4.2 mm×3.2 mm. The critical path delay of the circuit was 27.53 ns. This compares very favorably with the 62 ns that was reported by S. M. Kang (1987). A novel feature of the design is the reduction in the number of stages for shifting from six to four, resulting in a 30% increase in speed

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:27 ,  Issue: 2 )