微伏级直流电压信号放大电路设计
发布时间：2019-05-18 06:28
【摘要】：针对微伏级直流电压信号测量过程中存在信噪比低、测量精度不高和抗干扰能力差的问题,设计一种以TLC2652为核心器件的放大测量电路,实现了对5~45μV范围内电压信号的精准放大。电路采用低通滤波电路、陷波电路降低内部噪声与外部干扰;采用隔离电路,隔离测量端对采集端的影响;采用线性稳压芯片进行电源模块的设计,提高测量精度并降低功耗。经仿真实验验证,说明所设计的微伏级直流电压信号放大电路具有抑制共模干扰、抑制温漂、稳定性好、抗干扰性强等特点,测量精度达到0.044%。
[Abstract]:In order to solve the problems of low signal-to-noise ratio (SNR), low measurement accuracy and poor anti-interference ability in the process of micro-volt DC voltage signal measurement, a amplifier measuring circuit with TLC2652 as the core device is designed, and the accurate amplification of voltage signal in the range of 5 ~ 45 渭 V is realized. The circuit adopts low-pass filter circuit, the notch circuit reduces the internal noise and external interference, the isolation circuit is used to isolate the influence of the measuring terminal on the acquisition terminal, and the linear voltage stabilizer chip is used to design the power supply module to improve the measurement accuracy and reduce the power consumption. The simulation results show that the designed micro-volt DC voltage signal amplifier has the characteristics of suppressing common-mode interference, suppressing temperature drift, good stability and strong anti-interference, and the measurement accuracy is 0.044%.
【作者单位】： 南京信息工程大学气象灾害预报预警与评估协同创新中心;南京信息工程大学江苏省气象传感网技术工程中心;
【基金】：国家自然科学基金(61072133) 江苏省产学研联合创新资金计划(BY2013007-02) 江苏省高校自然科学研究重大项目(15KJA460008) 江苏省“六大人才高峰”计划和江苏省“信息与通信工程”优势学科资助
【分类号】：TN702
[Abstract]:In order to solve the problems of low signal-to-noise ratio (SNR), low measurement accuracy and poor anti-interference ability in the process of micro-volt DC voltage signal measurement, a amplifier measuring circuit with TLC2652 as the core device is designed, and the accurate amplification of voltage signal in the range of 5 ~ 45 渭 V is realized. The circuit adopts low-pass filter circuit, the notch circuit reduces the internal noise and external interference, the isolation circuit is used to isolate the influence of the measuring terminal on the acquisition terminal, and the linear voltage stabilizer chip is used to design the power supply module to improve the measurement accuracy and reduce the power consumption. The simulation results show that the designed micro-volt DC voltage signal amplifier has the characteristics of suppressing common-mode interference, suppressing temperature drift, good stability and strong anti-interference, and the measurement accuracy is 0.044%.
【作者单位】： 南京信息工程大学气象灾害预报预警与评估协同创新中心;南京信息工程大学江苏省气象传感网技术工程中心;
【基金】：国家自然科学基金(61072133) 江苏省产学研联合创新资金计划(BY2013007-02) 江苏省高校自然科学研究重大项目(15KJA460008) 江苏省“六大人才高峰”计划和江苏省“信息与通信工程”优势学科资助
【分类号】：TN702
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