Four-redundancy discrete signal integrated circuit

Abstract

The invention belongs to avionics technology, and relates to the improvement of a four-redundancy discrete signal integrated circuit. The improved four-redundancy discrete signal integrated circuit consists of a first triode switching circuit [1], a second triode switching circuit [2], a third triode switching circuit [3] and a fourth triode switching circuit [4] with the same circuit structure. The output end of the first triode switching circuit [1] is connected in parallel with the output end of the third triode switching circuit [3] and then is connected with power input ends of the second triode switching circuit [2] and the fourth triode switching circuit [4]; and the output ends of the second triode switching circuit [2] and the fourth triode switching circuit [4] are connected in parallel to become the output end of the four-redundancy discrete signal integrated circuit. The four-redundancy discrete signal integrated circuit has the advantages of simple circuit structure, elimination of a signal processing and converting circuit, greatly reduction of cost and improvement of reliability.

Description

technical field [0001] The invention belongs to the avionics technology and relates to the improvement of a four-redundancy discrete signal synthesis circuit. Background technique [0002] The structural principle of the existing four-redundancy discrete signal synthesis circuit is shown in figure 1 , it consists of a logic circuit, 4 signal processing circuits and a signal conversion circuit. The 4 discrete signals are respectively subjected to photoelectric isolation and level conversion by the 4 signal processing circuits and then input to the corresponding input terminals of the logic circuit. After logic processing, The output signal of the logic circuit is output after being processed by the signal conversion circuit. Its disadvantages are: the circuit structure is complex, the discrete signal needs to be converted repeatedly from analog to digital to analog, and the output of the logic circuit needs to be processed by photoelectric isolation, level conversion and exc...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the circuit structure is complex, the discrete signal needs to be converted repeatedly from analog to digital to analog, and the output of the logic circuit needs to be processed by photoelectric isolation, level conversion and excitation amplification, which not only increases the complexity of the circuit sex and cost, and reduces reliability

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