基于Proteus心血管测试仪前置放大端的研制

摘要

基于嵌入式计算机的心血管测试仪是以往产品的升级和换代。文中研制出一种前置放大电路，能对脉搏信号进行滤波和放大，并且放大倍数能方便地通过嵌入式计算机调节。借助Proteus仿真软件平台对电路进行仿真和性能测试分析。实验证明，仿真结果与实测结果达到了设计要求。证明该设计方法可以提高设计效率、节约成本、值得推广。%The cardiovascular tester based on the embedded computer is an updated version of the previous one. We developed a preamplifier circuit which can filter and amplify the pulse signal and the amplification can be easily adjusted by the embedded computer. The Proteus is adopted, on which circuit simulation and performance analysis is conducted. The results show that the simulation results and actual results are very close and meet the design re- quirements. Our design can improve design efficiency and save cost and is therefore worth popularizing.