A self-refresh triple-mode redundant counter

Abstract

The invention discloses a self-refreshing triple-modular redundancy counter, which comprises three counters J1, J2 and J3 and three voters B1, B2 and B3, which are mutually connected. According to the triple-modular redundancy counter disclosed by the invention, by feeding back results of the voters to the counters, the counting results of the counters can be refreshed timely, and accordingly the error cumulative effect of the counters can be eliminated; as long as two of the three counters do not go wrong simultaneously, the whole triple-modular redundancy counter can continue to normally work.

Description

technical field [0001] The invention belongs to the technical field of digital circuit counters, in particular to a self-refreshing triple-mode redundant counter. Background technique [0002] As early as 1956, von Neumann proposed to use redundancy and majority voters to construct reliable system. Since then, multi-mode redundancy and triple-mode redundancy have been widely used in reliability systems as the most basic technology. Since triple-mode redundancy requires less additional hardware overhead, and its reliability is very close to that of multi-mode redundancy, triple-mode redundancy technology is widely used in industry, traffic control, and aerospace fields. [0003] Triple-mode redundant counters are often used to strengthen the state machine counters in the system, because once an error occurs in the state machine counters, it will cause errors in the judgment of the state machine state and cause system malfunctions. The structure of the traditional three-mod...

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Problems solved by technology

[0003] The triple-mode redundant counter is often used to strengthen the state machine counter in the system, because once the state machine counter is wrong, it will cause the state machine state to be judged incorrectly and cause the system to malfunction

But after a period of time, when the counter 2 counts to 6, an error occurs, because the wrong counting result of the counter 3 has not been corrected, the values ​​of the three counters are different at this time, causing the voting device to not work normally, and the last three voting devices The outputs are all 0, which makes the entire triple-redundant counter count wrong

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