用于电光测量的电流放大器及其噪声测量方法  

Current Amplifier Used in Electro-optic Measurement and Its Noise Measurement

作　　者：谢春山[1] 田小建[1] 孙伟[1] 衣茂斌[1] 

机构地区：[1]吉林大学电子工程系,长春130023

出　　处：《吉林大学自然科学学报》1999年第4期57-60,共4页Acta Scientiarum Naturalium Universitatis Jilinensis

基　　金：国家自然科学基金!69876014;博士点基金!97018311

摘　　要：分析在微弱电流信号放大过程中由放大电路自身带来的各类噪声及其在电路输出端所产生的影响．用正弦波发生器法辅以锁相放大器（LIA）实现对放大电路噪声因子NF值的测量，进而判定各类放大器的最佳工作区间．This paper analyzes variable kinds of noise come from the amplifying circuit itself in the process of amplifying the small current signal, and their effects on the output part of the circuit. Also we measured the value of noise figure of the amplifying circuit by the method of the generator of sine wave support with a Lock-in Amplifier, by this way we can find out the best work region of different kinds of amplifiers.

关 键 词：热噪声 噪声电流 电流放大器 噪声测量 电光测量 

分 类 号：TN215[电子电信—物理电子学] TN247