Non-volatile electronic counter with improved reliability and a

Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Counter controlled counter

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377 241, 377 26, G06M 300

Patent

active

054504600

ABSTRACT:
A non-volatile electronic counter provides a substantially increased maximum count by utilizing a ring counting sequence to count the first n-1 events out of every n events, and a base-2 counting sequence to count each nth event. Each counting position of the ring counting sequence and the base-2 counting sequence is implemented with a memory stage that stores the logical state of the counting position when power is removed. Each memory stage can be implemented with redundant memory cells and voting logic, which provides the logic state represented by a majority of the redundant memory cells, to increase the reliability of the count.

REFERENCES:
patent: 4663770 (1987-05-01), Murray et al.
patent: 5181231 (1993-01-01), Parikh et al.
patent: 5231592 (1993-07-01), Itoh
A. M. Izmailov et al., Digital Counter Decades with Operational and Long-Term Memory, Instruments and Experimental Techniques, vol. 23, No. 6, Pt 1, pp. 1378-1380, Nov.-Dec 1980.
J. Lebel, A Mobile Facility for Electromagnetic Environ, International Electrical, Electronics Conference & Exposition, pp. 10-11, Oct. 5-7, 1981.
Data Sheet for HC2090, Hughes Semiconductor Products Center, two pages.

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