摘要
介绍声表面波（SAW）气体传感器原理及其信号处理电路原理，重点设计了传感器的频率检测电路。该频率检测电路基于FPGA技术，利用VHDL语言对各电路子模块编写了相应的代码，并用EDA软件QuartusⅡ完成了对电路的设计。该频率检测电路的测频范围为0．1-100MHz。仿真和实验结果表明，设计相对误差较小，满足了SAW气体传感器的要求。
The principle of SAW gas sensor and signal processing circuit is discussed, especially a circuit of frequency measurement is designed. The circuit is based on FPGA and realized by VHDL in Quartus Ⅱ. The range of frequency measurement is 100-10 MHz and the simulation and test show the relative error of the circuit is very small.
出处
《现代电子技术》
2009年第13期186-188,共3页
Modern Electronics Technique
关键词
SAW
信号处理
频率检测
FPGA
SAW
signal processing circuit
frequency measurement
FPGA
