Fault-tolerant analog output network

Details Fault-tolerant analog output network Fault-tolerant analog output network

1985-02-07

1987-03-24

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By electronic signal processing circuitry

376216, 364492, G21C 736

Patent

active

046524177

ABSTRACT:
An analog output network provides multiple communication paths for control of an actuator in response to an input signal. The analog output network includes at least two controllers, each of which is connected to an analog output circuit and a controller selector which is connected to each of the controllers and the analog output circuits. The controller selector ensures that at least one of the analog output circuits is enabled at all times and identifies one of the controllers as an on-line controller. The analog output circuit connected to the on-line controller generates an actuation signal which passes through the actuator and the other analog output circuit. An alternate current path comprising a diode string with a voltage drop larger than the voltage drop of the actuation signal in the other analog output circuit is provided so that if an analog output circuit is removed or defective, the actuation signal from the on-line analog output circuit is still provided with a current path.

REFERENCES:
patent: 4427620 (1984-01-01), Cook
patent: 4584165 (1986-04-01), Wilson

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