电化学伏安分析中放大器的低噪声设计  

Low Noise Design of Amplifier in the Voltage-ampere Analysis of Electrochemistry

作　　者：黄泽建[1] 林君[1] 

机构地区：[1]吉林大学智能仪器与测控技术研究所,长春130026

出　　处：《仪器仪表学报》2005年第5期518-521,共4页Chinese Journal of Scientific Instrument

基　　金：十五国家科技攻关重大课题(2001BA210A04)资助项目。

摘　　要：测量电化学伏安分析中微弱电流的电路系统,因被测电流是mA到nA级的微弱信号,所以低噪声是设计的关键。叙述了该系统的关键电路。通过分析放大器的输入特性参数所带来的误差影响,以及放大器的噪声估算等问题,提出了正确选择放大器芯片的思想。结果表明这是能够提高测量精度的一种有效方法。Concerning the circuit system to measure the weak current in the voltage-ampere analysis of electrochemistry, the noise is the key to this system because the current is from nA to mA. The key circuits of this system was discussed. It advanced the thought of right way to choose the OP based on the analysis of the operation amplifier problems, such as the error caused by the electrical characteristics, the noise calculation and so on. The results indicated that is an efficient method of improving the precision.

关 键 词：伏安分析 放大器 电化学 低噪声设计 电路系统 微弱电流 微弱信号 误差影响 特性参数 正确选择 有效方法 测量精度 

分 类 号：O657.14[理学—分析化学] TN722[理学—化学]