⚡ 本页包含 AI 生成的分析内容，仅供参考
本文提出了一种36V电流平衡仪表放大器，具有±24V输入范围和5.6MHz带宽，在所有增益设置下实现140dB共模抑制比，解决了高压环境下处理毫伏级信号和4-20mA电流信号时对宽输入范围和高CMRR的需求。
amplifiers (HV-IAs) are employed to process millivolt-level signals from sensors and standardized 4-to-20mA current signals from transmitters [1,2]. The latter are converted into voltage signals up to 10V via a 250Ω or 500Ω resistor before being processed by the HV-IA [3]. Therefore, gainadjustable IAs with a large differential input range (>20Vpp) are required. Due to common-mode (CM) interference and varying ground potentials, input signals can exhibit substantial CM components up to ±10V, necessitating a large CM input range and commonmode rejection-ratio (CMRR) of more than 120dB. Additionally, high input impedance (>10MΩ) [1] is essential for handling signal sources with weak driving capability, while the closed-loop architecture constrains the bandwidth at high-gain settings. These make energyefficient cap
Input Range, 5.6MHz BW, and 140dB CMRR at All Gain Settings
Shen Ye, Minge Jiang, Jiahao Wang, Shiqi Zhang, Peng Cao, Zhiliang Hong, Jiawei Xu Fudan University, Shanghai, China In industrial control systems, high-voltage instrumentation