High speed synchronous counter system and process with look-ahea

Details High speed synchronous counter system and process with look-ahea High speed synchronous counter system and process with look-ahea

1990-03-26

1991-10-29

Heyman, John S.

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

Systems

Including structure for detecting or indicating overflow...

377166, 377106, H03K 2116, H03K 2140

Patent

active

050621262

ABSTRACT:
High speed synchronous counters are constrained to operate within certain speeds due to delays inherent in the counter configurations. By utilizing look-ahead carries, that is, producing carry signals in anticipation of when they might be required, much of the delay can be eliminated. Speed performance can be further improved by fashioning the look-ahead carry system from programmable gate arrays, where non-standard logic structures can be created.

REFERENCES:
patent: 3631350 (1971-12-01), Drake
patent: 3943378 (1976-03-01), Beutler
patent: 4759043 (1988-07-01), Lewis
patent: 4860325 (1989-08-01), Aria et al.
patent: 4891827 (1990-01-01), Slater

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