SAFETY DISPATCHING CIRCUIT FOR DATA PROCESSOR FOR DISPATCHING BINARY SIGNAL

摘要

The invention relates to a safety circuit for a data processing system comprising two micro computers which operate in a redundant fashion receiving similar inputs and having similar output lines conveying coincident or corresponding signals during proper operation which are indirectly connected to a common push-pull amplifier. A transformer is connected in circuit with the push-pull amplifier and a conversion circuit constructed from the flip-flop trigger elements produces a pair of signals for operating the push-pull amplifier when the signal pair logic 1 exists. When the signal pair of logic 0 exists, the push-pull amplifier does not operate. The conversion circuit operates in connection with a clock pulse current supply for the two micro computers so that in the case of malfunction, no clock pulses are produced.