微波热声成像弱信号预放大电路  

Small-signal pre-amplifying circuit for microwave-induced thermoacoustic tomography

作　　者：韦育森[1] 杨国胜[1] 朱新亚[1] 

机构地区：[1]第四军医大学生物医学工程系,西安市710032

出　　处：《医疗卫生装备》2006年第12期11-12,共2页Chinese Medical Equipment Journal

基　　金：国家自然科学基金项目(60571041)资助。

摘　　要：为有效改善微波热声成像中微弱信号放大的信噪比和稳定性,设计了一种具有宽频带和高增益的低噪声弱信号放大电路。实验结果表明,该放大电路增益超过80dB,并且具有约7MHz的频带宽度。In order to improve the noise ratio and stability of the amplified small-signal in microwave-induced thermoacoustic tomography, an amplifying circuit with wide band and high voltage gain is designed in this paper. The results show that the voltage gain is up to 80dB and the bandwidth is about 7MHz.

关 键 词：带宽 前置放大器 增益 放大电路 

分 类 号：TN721[电子电信—电路与系统]