摘要
生物医学信号的振幅微小,频率范围较低,容易受外界干扰而积累大量环境噪声。为了提高测量的精准度,设计了一款高性能的低噪声前置放大器来有效提取生物电信号。前置放大器采用的是基于仪表放大器级联可变增益放大器架构,该架构可以实现对信号的1 000倍放大,并能达到良好的性能指标。仿真结果表明,在1 V的工作电压下,该前置放大器有较低的等效输入参考噪声1.584 2μV,较低的功耗2.92μW,适用于生物医学信号采集方面的应用。
Biomedical signals are of small amplitude and low frequency so that it is easily disturbed by the external environment,leading to superimpose a lot of noise.For the sake of increasing the accuracy of measurements,a pre-amplifier with good performance in order to extract biological signals effectively is proposed.The pre-amplifier is cascaded by instrumentation amplifier and variable gain amplifier so that it can achieve a signal amplification of 1000 times,and can achieve good performance.The simulation results indicate that the pre-amplifier has low equivalent input reference noise of 1.584 2μV and low consumption of 2.92μW under the operation voltage of 1 V,it is applicable in the field of biomedical signal acquisition
作者
邝小飞
陶祺
范富轩
KUANG Xiaofei;TAO Qi;FAN Fuxuan(Key Laboratory of RF Circuit and System,Ministry of Education,Hangzhou Dianzi University, Hangzhou 310018,China)
出处
《电子科技》
2018年第4期5-8,15,共5页
Electronic Science and Technology
基金
国家自然科学基金(61274029)
关键词
低噪声
低功耗
生物医学信号
前置放大器
low noise
low power consumption
biomedical signal
pre-amplifier
