Design of portable signal acquisition system based on FPGA and NAND Flash

Abstract

Aiming at the problem of low sampling rate and poor portability in the current signal acquisition system, this paper designs a signal acquisition system with high speed and strong portability based on FPGA. Firstly, FPGA samples the signal at a high speed through controlling the ADC. And then，the data is stored in the NAND Flash by using the DMA(Direct Memory Access) mode. Finally, the signal stored in the NAND Flash chip could be demonstrated live by using the LCD. Paper begins with describing the overall design framework of the system. Then, it introduces the hardware design and the implementation, followed by the outcome produced by the experiment that the signal acquisition system samples the ultrasonic signal. The experiment results show that the system could carry on a long-time and multi batch data acquisition stably at relatively high sampling rate.

Keywords

• FPGA
• signal acquisition system
• NAND Flash
• LCD display