IRIG-B code decoder

The utility model belongs to the technical field of electronic communication, relates to a decoder, in particular to an IRIG-B code decoder. The IRIG-B code decoder comprises a DC code decoding module, an AC code decoding module, and an FPGA chip; wherein the DC code decoding module includes a DC code interface and a level conversion circuit. The DC code is input to a level conversion module through the DC code interface and converted and then input to the FPGA chip to be decoded; the AC code decoding module comprises a sample clock generation module, a signal sample process module and an isolation transformer for performing the isolation protection of the input AC code. The IRIG-B code decoder has the following advantages that the IRIG-B(AC) code and the IRIG-B(DC) code are simultaneously decoded, in order to solve the speed of the decoded signal and the time accuracy and reduce the decoding error, a single-chip microcomputer and an FPGA are combined to perform the decoding analysis and calculation.