Design of 1553B Encoder and Decoder

1553B bus is widely used in aerospace because of its high performance in reliability and real time characteristic. In view of the drawbacks of using imported chips to realize 1553B communication, FPGA is used to realize 1553B communication in this paper. In current method, the 1553B decoder can only work when positive and negative signals are input simultaneously. In this paper the decoder is improved to support 3 models:only positive signal input, only negative signal input, both positive and negative signals input simultaneously. The test results show that the design scheme has good uniformity with the scheme that uses imported chips. The 1553B controller which we have fully independent intellectual property right has been tested for large times, and it runs stably and meets the requirements of aerospace engineering.