The multiplex of synchronous signal and asynchronous signal Implemented by FPGA

As a new circuit design technology, FPGA is the most potential and progressive in the field of VLSI during these years.Computer serial communication signal is compliant to asynchronism start/stop control protocol,however,the telephone sampling signal is periodic.A method of multiplexing of the two kinds of signals and its FPGA implementation are introduced in this article.In order to enlarge channel capacity.The two signals must be tramsferred to one signal channel with identical transfer rate.So a method of justification is used here to achieve the multiplex.