FPGA based Time Code Generation and Dissemination in a Distributed Control Systems

Abstract This paper discusses the development of a FPGA based standard time IRIG-B DC (unmodulated) and AC (modulated) code generation cum dissemination system over serial and Ethernet (unicast and multicast mode) network using verilog HDL which in turn trigger all sequential control actions occurring across the entire sensor network based on precise time stamping. Design of external signal conditioning circuitry for IRIG-B AC code is also described. The total development is based on modular approach in a single FPGA board for generation, dissemination, modulation and monitoring facility in case of flight vehicle control.