Barrel shifter

Details Barrel shifter Barrel shifter

1989-07-17

1990-10-09

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Shift register

Shift direction control

377 70, 36471508, G06F 700, H03K 1700

Patent

active

049625110

ABSTRACT:
There is disclosed a barrel shifter for providing efficient wiring therein and a compact composition as compared with conventional ones, in which a low-level-input resistor and a high-level-input resistor are arranged in parallel to each other, and low-level-input-bit lines and high-level-input-bit lines are alternately arranged corresponding to both resistors respectively, the width of both the input and output sides of a barrel-shifter main unit are so arranged as to be substantially the same as the width of the respective resistors substantially defined by wiring width of the respective input-bit lines, and a wiring area from the high-level-input resistor is incorporated in the barrel-shifter main unit as well as a wiring area from the low-level-input resistor.

REFERENCES:
patent: 4181976 (1980-01-01), Collins et al.
patent: 4665538 (1987-05-01), Machida
patent: 4811369 (1989-03-01), Barnard et al.
patent: 4821299 (1989-04-01), Kawai et al.

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