Barrel shifter having CMOS structure integrated on MOS integrate

Details Barrel shifter having CMOS structure integrated on MOS integrate Barrel shifter having CMOS structure integrated on MOS integrate

1994-06-30

1995-10-10

Wambach, Margaret Rose

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

Shift register

36471508, H03K 2346

Patent

active

054577233

ABSTRACT:
In a barrel shifter comprising input data lines DI wired in the form of steps, output data lines DO wired laterally, and CMOS transfer gates arranged in a matrix in which the output data lines DO are connected with the input data lines DI shifted by the number of bits in accordance with the shift rate, either source or drain of P-type transfer gates P41 and P42 is made common and the source or drain of N-type transfer gates N40 and N41 is made common. The wiring of shift bit control lines S, #S for controlling transfer gates is designed to be straight by shifting transfer gates by 1 bit for P-type and N-type, the source or drain of the transfer gate being made common. With this design, the output capacity of transfer gates is reduced and the wiring length of transfer gate control signals is shortened.

REFERENCES:
patent: 4839839 (1989-06-01), Tokumaru et al.
patent: 4962511 (1990-10-01), Tokumaru
patent: 5099445 (1992-03-01), Studor et al.

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