A novel tunable capacitively-copuled instrumentation amplifier with 14.4 nV/ √(H z) noise and 190.47 nW micro-power for ECG applications

IF 2.2 3区工程技术 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Integration-The Vlsi Journal Pub Date : 2024-08-30 DOI:10.1016/j.vlsi.2024.102268

Sujeet Kumar Gupta , Riyaz Ahmad , Dharmendar Boolchandani , Sougata Kumar Kar

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Abstract

This paper describes a low-power, low-noise capacitively-coupled instrumentation amplifier (CCIA) designed for capturing biopotential signals. The main advantage of proposed design are as (i) CCIA based on new IA has been proposed, (ii) the lower cutoff frequency has been improved by adding MOS based resistor, (iii) g_m enhancement circuit is added in operational transconductance amplifier (OTA) based fully differential difference amplifier (FDDA)to improve gain and bandwidth. The DC electrode-offset voltage is reduced and the input impedance is increased by using feedback mechanism. Cadence EDA tool is used to analyze the findings of the proposed CCIA's in 0.18 μm, CMOS technology with a 1.8 V power supply. The proposed CCIA architecture has an adjustable mid-band gain from 52.55 to 61.11 dB for bias voltage ranges from 0.1 to 0.6 V, frequency range of 0.06 Hz–1.72 kHz, and a CMRR of 122 dB. The proposed CCIA has a total power dissipation of 190.47 nW and equivalent input referred noise (IRN) of 14.4 nV/sqrtHz at 0.01 Hz. It only occupies 0.01 mm² of core area. To assess the robustness of suggested design, PVT analysis, post layout simulation and a comparison with previously published works demonstrates the competence of the design.

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用于心电图应用的新型可调电容表列仪表放大器，噪声为 14.4 nV/√（H z），微功率为 190.47 nW

本文介绍了为捕捉生物电位信号而设计的低功耗、低噪声电容耦合仪表放大器（CCIA）。该设计的主要优点包括：(i) 基于新型 IA 的 CCIA 已被提出；(ii) 通过添加基于 MOS 的电阻器提高了较低的截止频率；(iii) 在基于运算跨导放大器（OTA）的全差分差动放大器（FDDA）中添加了 gm 增强电路，以提高增益和带宽。通过使用反馈机制，降低了直流电去抵消电压，增加了输入阻抗。使用 Cadence EDA 工具分析了在 0.18 μm CMOS 技术和 1.8 V 电源条件下开发的 CCIA 的结果。在偏置电压范围为 0.1 至 0.6 V、频率范围为 0.06 Hz-1.72 kHz、CMRR 为 122 dB 时，拟议的 CCIA 架构具有 52.55 至 61.11 dB 的可调中频增益。拟议的 CCIA 的总功耗为 190.47 nW，0.01 Hz 时的等效输入参考噪声 (IRN) 为 14.4 nV/sqrtHz。它仅占用 0.01 平方毫米的内核面积。为了评估所建议设计的稳健性，我们进行了 PVT 分析、布局后仿真，并与以前发表的作品进行了比较，从而证明了该设计的能力。

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来源期刊

Integration-The Vlsi Journal 工程技术-工程：电子与电气

CiteScore

3.80

自引率

5.30%

发文量

107

审稿时长

6 months

期刊介绍： Integration''s aim is to cover every aspect of the VLSI area, with an emphasis on cross-fertilization between various fields of science, and the design, verification, test and applications of integrated circuits and systems, as well as closely related topics in process and device technologies. Individual issues will feature peer-reviewed tutorials and articles as well as reviews of recent publications. The intended coverage of the journal can be assessed by examining the following (non-exclusive) list of topics: Specification methods and languages; Analog/Digital Integrated Circuits and Systems; VLSI architectures; Algorithms, methods and tools for modeling, simulation, synthesis and verification of integrated circuits and systems of any complexity; Embedded systems; High-level synthesis for VLSI systems; Logic synthesis and finite automata; Testing, design-for-test and test generation algorithms; Physical design; Formal verification; Algorithms implemented in VLSI systems; Systems engineering; Heterogeneous systems.