Digital circuit including fail-safe circuit

Details Digital circuit including fail-safe circuit Digital circuit including fail-safe circuit

1990-03-27

1991-11-12

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072964, H03K 19007

Patent

active

050650475

ABSTRACT:
A digital circuit including a processor operated in synchronization with a clock signal to output a control signal to be fed to an actuator, in which a converter converts a period of frequency of the clock signal to an analog voltage value, and a comparator compares whether or not the analog voltage value is within a reference value range to output a comparison signal, and in which a holding device allows the control signal to pass or stop to the actuator on the basis of the comparison signal.

REFERENCES:
patent: 4446437 (1984-05-01), Rinaldi
patent: 4539523 (1985-09-01), Rosso
patent: 4627085 (1986-12-01), Yuen
patent: 4667184 (1987-05-01), Futsuhara
patent: 4859872 (1989-08-01), Hyakutake
patent: 4900951 (1990-02-01), Saito et al.
patent: 4914316 (1990-08-01), Rossi et al.

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