中文摘要：

结合现代传感器前置放大器构成特点,探讨了现代传感器前置放大器设计过程中的几个误区与对策.结果表明：噪声系数最小有时并不能得到最佳噪声性能;RFI整流误差是一个重要而容易被忽视的误差源;驱动电容性负载的情形常见且易振荡;芯片电源噪声（纹波）频率较高时单电容去耦无效.给出了这些问题的实用解决方法.

英文摘要：

Considering the features of modern pre-amplifier circuit configurations, several misunderstandings and countermeasures in pre-amplifier design for sensor signal conditioning are studied. The results indicated that sometimes minimizing noise factor can＇t optimize the noise performance sometimes. RFI rectification errors are important error sources and to be often ignored, driving capacitive loads is common and oscillation problem often occurs, and using a single decoupling capacitor isnt an effective way to decoupling ICs at high power noise （ripple） frequencies. The solu- tions to these problems are proposed.