A novel single DVCCTA based electronically tunable, wideband, four-mode instrumentation amplifier

IF 1.5 4区地球科学 Q3 ASTRONOMY & ASTROPHYSICS

Radio Science Pub Date : 2025-06-01 DOI:10.1029/2025RS008241

Harika Pamu;Puli Kishore Kumar;Kiran Kumar Gurrala

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引用次数: 0

Abstract

This paper describes a new instrumentation amplifier (IA) that has the ability to operate in all four possible modes: voltage, current, transimpedance, and transadmittance mode using a single Differential Voltage Current Conveyor Transconductance Amplifier (DVCCTA) along with external grounded resistors. The suggested IA structures offer a broad range of common mode rejection ratio bandwidth (BW) and differential gain (Adm) bandwidth of around (18.7 MHz, 26 MHz) for voltage mode, (17.29 MHz, 1.05 GHz) for current mode, (25.25 MHz, 168 MHz) for transimpedance mode and (17.29 MHz, 1.05 GHz) for transadmittance mode respectively, in which an unreported finding of 1.05 GHz gain BW underscores the uniqueness of the designs. Additionally, they are suitable for IC integration due to the available grounded passive attributes. Moreover, the designs come with an interesting feature for electronically tuning the gains via biasing current (IB) and also have a low power dissipation. Realization of DVCCTA uses 20MOS transistors, and OrCAD PSPICE with a 0.18 μm TSMC CMOS technology parameter is used to authenticate the workableness of the proposed IA circuits. The performance of the suggested topologies is analyzed by considering the non-idealities of the DVCCTA. Apart from that, process, voltage, temperature-dependent variations and Monte Carlo simulations are also delineated for the verification of the proposed designs. The functionality of the circuits has also been validated through practical experimentation, employing commercially accessible current feedback operational amplifiers, such as the ICAD844 and post layout simulations. The simulation results correlate well with the theoretical prediction.

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一种新型的基于单DVCCTA的电子可调谐宽带四模仪表放大器

本文介绍了一种新的仪表放大器（IA），它能够在所有四种可能的模式下工作：电压，电流，跨阻和跨导纳模式，使用单个差分电压电流传送带跨导放大器（DVCCTA）以及外部接地电阻。建议的IA结构提供宽范围的共模抑制比带宽（BW）和差分增益（Adm）带宽，分别为电压模式（18.7 MHz, 26 MHz），电流模式（17.29 MHz, 1.05 GHz），跨阻模式（25.25 MHz, 168 MHz）和跨导纳模式（17.29 MHz, 1.05 GHz），其中未报道的1.05 GHz增益BW的发现强调了设计的独特性。此外，由于可用的接地无源属性，它们适用于IC集成。此外，该设计还具有一个有趣的功能，即通过偏置电流（IB）对增益进行电子调谐，并且功耗低。DVCCTA的实现采用20MOS晶体管，采用0.18 μm TSMC CMOS技术参数的OrCAD PSPICE验证了所提出的IA电路的可操作性。通过考虑DVCCTA的非理想性，分析了所建议拓扑的性能。除此之外，还描述了工艺、电压、温度相关变化和蒙特卡罗模拟，以验证所提出的设计。电路的功能也通过实际实验得到验证，采用商业上可获得的电流反馈运算放大器，如ICAD844和后布局仿真。仿真结果与理论预测吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radio Science 工程技术-地球化学与地球物理

CiteScore

3.30

自引率

12.50%

发文量

112

审稿时长

1 months

期刊介绍： Radio Science (RDS) publishes original scientific contributions on radio-frequency electromagnetic-propagation and its applications. Contributions covering measurement, modelling, prediction and forecasting techniques pertinent to fields and waves - including antennas, signals and systems, the terrestrial and space environment and radio propagation problems in radio astronomy - are welcome. Contributions may address propagation through, interaction with, and remote sensing of structures, geophysical media, plasmas, and materials, as well as the application of radio frequency electromagnetic techniques to remote sensing of the Earth and other bodies in the solar system.