Multi-channel Multiplexed Stand-alone Audio Data Acquisition System: The effect of settling time on acquisition accuracy

摘要

This paper discusses the design and implementation of a low cost, fast, hardware reconfigurable and multi-channel audio data acquisition and monitoring system. This proposed system is capable of collecting and processing multi-channel audio sources without the need of a personal computer and storing them into a storage device. The design uses system-on-chip technology and hardware-software co-design to integrate all functions needed by this application into a single Field Programmable Gate Array. The new design strategy saves hardware, space, and power consumption. The proposed system has been implemented and tested. The produced prototype uses only 15% of the total chip capacity. The worst-case propagation delay observed for the system is 12.04 ns, which is less than the 50 MHz clock period of 20ns. The Cyclone-II FPGA consumes low power as 12 mW. Its performance compares very favorably to that of existing PC based systems.