Communications: electrical – Digital comparator systems
Patent
1976-12-15
1978-08-15
Smith, Jerry
Communications: electrical
Digital comparator systems
G06F 1110
Patent
active
041076494
ABSTRACT:
In an error detection circuit of a data processing circuit having a parity generator, a parity signal is predicted from an initial value determined by the data storing state of the data processing circuit in its initial state and a count value of the number of logic "1" or "0" in input data of the data processing circuit and/or the number of logic "1" "0" of output data, obtained by counters or the like. A parity signal derived from the parity generator is compared with the predicted parity signal to detect malfunction of the error detection circuit.
REFERENCES:
patent: 3119098 (1964-01-01), Meade
patent: 3342983 (1967-09-01), Pitkowsky et al.
patent: 3562711 (1971-02-01), Davis et al.
patent: 3911261 (1975-10-01), Taylor
Fujitsu Limited
Smith Jerry
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