Design of LIA Processor with Nano Size Electronic Technology Based on FPGA chip

摘要

Lock-in Amplifier is very useful in many weak signals processing systems. To lower down the system cost and to raise the speed of the system, a digital Lock-in Amplifier processor with nano size electronic technology based on FPGA chip and the algorithm appropriate for hardware to implement was introduced. The frequency of the signal which can be lock-in amplified by the processor is up to 158 KHz, and the error in the experiment is less than 1.27‰. Also, the cost of the system is much lower than the system scheme based on DPS chips.