High security counter

Details High security counter High security counter

1992-03-18

1994-03-22

Heyman, John S.

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

Applications

Including memory

377 241, 364561, G06F 1100

Patent

active

052971783

ABSTRACT:
A high security counting system is shown for counting events represented by an event signal. The counting system includes a nonerasable programmable read only memory which is programmed by a programmer under the control of a controller. The controller is responsive to an event signal for controlling the programmer to program a bit from a first value to a second value wherein each bit programmed to a second value represents a unit of count and the number of bits programmed to the second value represents the count of said counter.

REFERENCES:
patent: 4559637 (1985-12-01), Weber
patent: 4642787 (1987-02-01), McCarthy et al.
patent: 4803646 (1989-02-01), Burke et al.
patent: 4860228 (1989-08-01), Carroll
patent: 5046029 (1991-09-01), Ikeda
patent: 5103411 (1992-04-01), Shida et al.

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