Boots – shoes – and leggings
Patent
1986-03-27
1989-05-02
Harkcom, Gary V.
Boots, shoes, and leggings
377 64, G06F 700, G06F 1500
Patent
active
048274410
ABSTRACT:
A barrel shifter comprises a first plurality of bit lines, a second plurality of bit lines and a plurality of switchable interconnections therebetween. A first subset of the switchable interconnections provide each of a set of desired shifts, while a second subset of the switchable interconnections duplicate certain of the first subset thereof and shorten the worst-case path lengths through the shifter. The first and second pluralities of bit lines may comprise interleaved high- and low-order bit lines of two data buses. Interface means may provide the interleaving function and also may provide means for accomplishing at least one shift in addition to the set of desired shifts. Sense amplifiers may be included for sensing voltage transitions on each bit line.
REFERENCES:
patent: 4338675 (1982-07-01), Palmer et al.
patent: 4387341 (1983-06-01), Martinson
patent: 4396994 (1983-08-01), Kang et al.
patent: 4475173 (1984-10-01), Talmi
patent: 4509144 (1985-04-01), Palmer et al.
patent: 4583197 (1986-04-01), Chappell et al.
patent: 4665538 (1987-09-01), Machida
Mead et al, Introduction to VLSI Systems, pp. 157-162, Addison Wesley Publishing Co., 1980.
Pappert Bernard
Someshwar Ashok
Harkcom Gary V.
Meyer Jonathan P.
Motorola Inc.
Shaw Dale M.
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