Shift register apparatus with improved clock supply

Details Shift register apparatus with improved clock supply Shift register apparatus with improved clock supply

1990-10-29

1992-07-07

Heyman, John S.

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

Shift register

Particular transfer means

377 78, 377 79, 377117, G11C 1140, G11C 1928, H03K 2344

Patent

active

051289741

ABSTRACT:
A shift register apparatus comprising unit registers, clocks and gates. Only when data input to the apparatus is significant enough to shift the state of the unit registers, is the clock signal supplied selectively to the unit register of the applicable stage. The selective supplying of the clock signal reduces the power fed to clock lines. With a larger number of shift stages, a greater amount of power will be saved, especially in applications where the apparatus is used to generate multiphase pulses. Fewer drivers are needed to drive the clock signal, which may be supplied at the TTL level.

REFERENCES:
patent: 3573498 (1971-04-01), Ahrons
patent: 3683203 (1972-08-01), Smith
patent: 3993916 (1976-11-01), Copeland et al.
patent: 4224531 (1980-09-01), Ebihara et al.
patent: 4484087 (1984-11-01), Mazin et al.
IBM Tech. Discl. Bul. vol. 13 No. 5 Oct. 1970 pp. 1349 1350; "Noncomplementary Static Shift Register" By Gaensslen & Krick.

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