Acquisition System of Mixed Coding Frame of Analog-to-digital Data Based on FPGA

The design of the multi-channel sampling encoder based on FPGA,which is the core logic control module of the system is introduced.The design uses a 16-bit AD8405 as the ADC,and FPGA as a central logic control module,which completes data acquisition on the different rate of the analog signal and the received digital signal,and acquisition of signals in data frame format in the form of mixed frame and storage,communicating with host computer via the serial interface.FPGA modules uses VHDL as program language.This system uses ground test system for real-time monitoring and feature detection to the acquisition process of the editors in a test state.