Programmable threshold detection logic for a digital storage buf

Details Programmable threshold detection logic for a digital storage buf Programmable threshold detection logic for a digital storage buf

1989-04-27

1990-11-06

Heyman, John S.

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

Systems

Complementing a count

307464, 377 49, 377 51, G06F 700

Patent

active

049691643

ABSTRACT:
A threshold detection logic circuit of simple and economical design is disclosed that indicates when the difference in the number of first operations to be counted and the number of second operations to be counted is either greater than or equal to a threshold value, or less than or equal to a threshold value. The threshold detection logic circuit employs the use of an overflow bit of a counter, which has a counting range of 2.sup.N+1 for a threshold range of 2.sup.N, in order to generate a threshold interrupt signal. In addition, the disclosed threshold detection logic circuit permits the threshold value to be programmed to any desired value.

REFERENCES:
patent: 3924078 (1975-12-01), Bussey
patent: 4139840 (1979-02-01), Mogi
patent: 4667337 (1987-05-01), Fletcher
patent: 4713832 (1987-12-01), Hutson
patent: 4837748 (1989-06-01), Chung et al.

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