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一种微弱电荷检测放大电路设计 被引量:4
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作者 杨志文 赵冬青 +1 位作者 焦新泉 贾兴中 《电子元件与材料》 CAS CSCD 北大核心 2019年第2期71-75,共5页
针对传统电荷放大器对电缆噪声敏感,无法精确测量微弱电荷的问题,设计了一种三运放差动放大电路。通过构建传统电荷放大电路的噪声模型,分析了本底噪声对测量结果的影响,针对其共模特性,设计了三运放差动放大电路,放大微弱电荷同时能有... 针对传统电荷放大器对电缆噪声敏感,无法精确测量微弱电荷的问题,设计了一种三运放差动放大电路。通过构建传统电荷放大电路的噪声模型,分析了本底噪声对测量结果的影响,针对其共模特性,设计了三运放差动放大电路,放大微弱电荷同时能有效抑制电缆中的本底噪声,提高电路的共模抑制比。经Multisim仿真和硬件电路实验证明,该电路能实现±1.5 pC微弱电荷的检测放大,在电缆叠加32.8 mV干扰噪声的情况下,输出信号幅值与理论值误差仅为1.3%,进而验证了该电路的可行性与可靠性。 展开更多
关键词 电荷放大器 微弱电荷 差动放大电路 本底噪声 共模特性 共模抑制比
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NOVEL DESIGN OF A BIOELECTRIC AMPLIFIER WITH MINIMIZED MAGNITUDE AND PHASE ERRORS 被引量:1
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作者 Mashhour Bani Amer Assistant Professor 《Journal of Electronics(China)》 2001年第3期242-254,共13页
A new design of a bioelectric amplifier that has better parameters than conventional designs is presented. The design allows the construction of bioelectric amplifier with improved parameters in terms of common-mode r... A new design of a bioelectric amplifier that has better parameters than conventional designs is presented. The design allows the construction of bioelectric amplifier with improved parameters in terms of common-mode rejection ratio and phase and magnitude errors. The voltage gain is easily adapted to a wide range of biomedical applications. The experimental and simulation results of the designed bioelectric amplifier are also included. 展开更多
关键词 Bioelectric AMPLIFIER INSTRUMENTATION AMPLIFIER common-mode REJECTION ratio
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A High-performance Small Signal Amplifier
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作者 GUO Li ZHENG Shuang 《Journal of Northeast Agricultural University(English Edition)》 CAS 2005年第2期141-145,共5页
According to questions in the design of high quality small signal amplifier, this paper gave a new-type high performance small signal amplifier. The paper selected the operational amplifier of ICL Company and designed... According to questions in the design of high quality small signal amplifier, this paper gave a new-type high performance small signal amplifier. The paper selected the operational amplifier of ICL Company and designed a new-type circuit with simple, low cost and excellent performance, 展开更多
关键词 small signal application system MEASURE common-mode rejection ratio
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