精密低噪声前置放大电路的设计  

Design of High Accuracy and Low-noise Preamplifier Circuit

作　　者：齐学红[1] 李思政[1] 裴立云[1] 

机构地区：[1]淮安信息职业技术学院,江苏淮安223003

出　　处：《核电子学与探测技术》2010年第11期1509-1511,共3页Nuclear Electronics & Detection Technology

摘　　要：介绍了一种中、低频低噪声前置放大电路的设计方案。理论分析影响低噪声前置放大电路的因素;采用抑制噪声和直流漂移电路减小噪声干扰;并对设计电路进行测试和分析。测试表明其等效输入噪声失真率≤0.04%（输出9.5 rms时）;在1~100 kHz范围内,频率稳定度≤0.01%。A low-frequency and low-noise preamplifier circuit is designed.Some elements are analyzed on the low-noise preamplifier circuit.Noise interference is reduced by low-noise and DC drift suppression circuit.Test and analysis are also developed.Tests show that the equivalent input noise distortion rate ≤ 0.04%（output 9.5 rms pm） and the frequency stability ≤ 0.01% in the range of 1~100 kHz.

关 键 词：前置放大电路 低噪声 抑制直流漂移 

分 类 号：TN702[电子电信—电路与系统]