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Current mode instrumentation amplifier with CDCCC
Analog Integrated Circuits and Signal Processing ( IF 1.4 ) Pub Date : 2021-06-03 , DOI: 10.1007/s10470-021-01890-3
Rupam Das , Sajal K. Paul

In this paper, a new current-mode instrumentation amplifier is presented using a single current differencing current controlled current conveyor building block and one grounded resistor. The proposed instrumentation amplifier (IA) can easily be cascaded due to the possession of low impedance current input, and high impedance current output. It offers a high differential gain (73.35 dB) and high bandwidth (BW), 44.8 MHz. Moreover, the common-mode rejection ratio (CMRR) is also very high (93.58 dB), and CMRR BW 5.5 kHz. Power dissipation is found to be low at 132 µW. Furthermore, the electronic tuning of gain is the added feature of the circuit. The non-ideality performance of IA is investigated. The proposed IA functionality is verified through the Cadence ORCAD PSPICE simulator using 0.18 µm TSMC (Level 7) technology parameters. The circuit's workability has also been presented experimentally using commercially available current feedback operational amplifier ICs AD844. Comparison of the performances such as differential gain, BW, CMRR, power consumption, and ease of cascading is reported.



中文翻译:

具有 CDCCC 的电流模式仪表放大器

在本文中,使用单个电流差分电流控制电流传送器构建块和一个接地电阻器介绍了一种新的电流模式仪表放大器。由于拥有低阻抗电流输入和高阻抗电流输出,所提出的仪表放大器 (IA) 可以很容易地级联。它提供高差分增益 (73.35 dB) 和高带宽 (BW),44.8 MHz。此外,共模抑制比 (CMRR) 也非常高 (93.58 dB),CMRR BW 为 5.5 kHz。发现功耗低至 132 µW。此外,增益的电子调谐是电路的附加功能。研究了 IA 的非理想性能。提议的 IA 功能通过 Cadence ORCAD PSPICE 模拟器使用 0.18 µm TSMC(7 级)技术参数进行验证。电路' 还使用商用电流反馈运算放大器 IC AD844 通过实验展示了其可操作性。报告了差分增益、BW、CMRR、功耗和级联难易等性能的比较。

更新日期:2021-06-28
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