Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Using shift register
Patent
1989-12-15
1991-07-16
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Using shift register
377 77, 377 81, 377 70, 307602, H03K 513, G11C 1900
Patent
active
050330675
ABSTRACT:
A variable length shift register is formed of a plurality of flip-flops arranged to form separate shift registers of different lengths. The shift registers are interconnected by multiplexers which connect either the input or the output of each shift register to the input of an adjacent shift register. Control signals are provided to the multiplexers to controllably select the length of the variable shift register by selectively inserting shift registers into the variable shift register and bypassing others.
REFERENCES:
patent: 3786440 (1974-01-01), Toyen
patent: 3887795 (1975-06-01), Eyrick et al.
patent: 4016511 (1977-04-01), Ramsey et al.
patent: 4567385 (1986-01-01), Falater et al.
patent: 4777385 (1988-10-01), Hartmeier
patent: 4845390 (1989-07-01), Chan
Cole Gary B.
Gingell Michael J.
Alcatel NA Network Systems Corp.
Heyman John S.
Van Der Sluys Peter C.
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