Shift register

Details Shift register Shift register

1991-11-25

1993-04-13

Sikes, William L.

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

Shift register

377 68, 377 77, 377 79, 377 80, H03K 3284

Patent

active

052029085

ABSTRACT:
A shift register includes a plurality of alternating shifting and latching sections connected in cascade. The phases of clocks (CLK, CLKB) for driving transmission gates (10, 14) of the shifting sections advance in phase relative to the phases of clocks (CLK, CLKB1) for driving transmission gates (12, 16) of the latching sections. The ON-resistance of the transmission gates (10, 14) of the shifting sections is sufficiently larger than that of the transmission gates (12, 16) of the latching sections, so that even when both of the clocks CLK and CLKB are at H or L levels due to delay imparted by inverters included in a clock generator, data to be latched is always given priority over data to be shifted. Thus, the shift register is free of a race condition which otherwise would be caused by a phase difference between the driving clocks.

REFERENCES:
patent: 4843254 (1989-06-01), Motegi et al.
patent: 5003201 (1991-03-01), Bai
patent: 5008905 (1991-04-01), Lee et al.
patent: 5015875 (1991-05-01), Giles et al.

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