High-Speed Digital-Controlled Variable Voltage Source with Current Monitor for EIT Application
This paper presented the design method of a digitalcontrolled variable voltage source with current monitor function. The hardware of system mainly consists of FPGA, DAC, programmable gain amplifier, current sensing circuit and comparator. By using high-speed analog comparator to convert over-current time to length of digital pulse, the FPGA could monitor the amplitude of current dynamically. In aspect of software, CORDIC algorithm is implemented in FPGA to realize the DDS function and related algorithms. Simulation result shows that system has good performance over wide frequency range. With the advantages of accuracy and high stability, it is suitable for EIT application.
EIT Current monitor FPGA CORDIC Variable Voltage source
Nan Li Hui Xu Nan Li Wei Wang Weida Zhang
School of Electronic Science and Engineering National University of Defense Technology Changsha, Chi Biomcdical Engineering Research Group University of Sussex Brighton, United Kingdom
国际会议
上海
英文
1116-1119
2011-10-15（万方平台首次上网日期，不代表论文的发表时间）