Reconfigurable Ferroelectric Bandpass Filter With Low-Frequency Noise Analysis for Intracardiac Electrogram Monitoring

IF 2.7 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

IEEE Journal on Exploratory Solid-State Computational Devices and Circuits Pub Date : 2025-06-30 DOI:10.1109/JXCDC.2025.3584711

Jianwei Jia;Zhenge Jia;Omkar Phadke;Yiyu Shi;Shimeng Yu

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引用次数: 0

Abstract

Implantable cardioverter defibrillators (ICDs) provide real-time monitoring and immediate defibrillation for life-threatening arrhythmias. However, the intracardiac electrogram (IEGM) acquisition of ICDs faces stringent constraints, including power consumption, low-frequency noise, and patient-specific physiological variability. This article introduces an ultralow-power, high-resolution, reconfigurable three-stage bandpass filter designed specifically for IEGM, utilizing ferroelectric field-effect transistor (FeFET) technology provided by a foundry platform. By employing adjustable threshold voltage

$V {_{\text {th}}}$

and gate capacitance of FeFET as programmable pseudo-high-value resistors (PHVRs) and capacitor structures, the filter enables personalized cardiac signal isolation tailored to individual patient needs. In addition, this work incorporates, for the first time, a comprehensive low-frequency noise model covering the entire operational region of FeFET into circuit-level analysis. Based on GlobalFoundries (GF) 28-nm SLPe FeFET-enabled process, the proposed filter achieves a wide gain tuning range (17–77 dB) and a flexible bandwidth tuning range (0.5–19 Hz for low cutoff frequency and 23–138 Hz for high cutoff frequency), with an average power consumption of 257 nW and minimum 11-

$\mu $

V resolution.

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具有低频噪声分析的可重构铁电带通滤波器用于心内电监测

植入式心律转复除颤器（ICDs）为危及生命的心律失常提供实时监测和即时除颤。然而，icd的心内电图（IEGM）采集面临着严格的限制，包括功耗、低频噪声和患者特定的生理变异性。本文介绍了一种专门为IEGM设计的超低功耗、高分辨率、可重构的三级带通滤波器，该滤波器利用了一家代工平台提供的铁电场效应晶体管（FeFET）技术。通过采用可调阈值电压$V {_{\text {th}}}$和FeFET栅极电容作为可编程伪高值电阻器（phvr）和电容结构，该滤波器可实现个性化的心脏信号隔离，以满足患者的个性化需求。此外，这项工作首次将覆盖整个ffet工作区域的全面低频噪声模型纳入电路级分析。基于GlobalFoundries （GF）的28纳米SLPe fefet工艺，该滤波器实现了宽增益调谐范围（17-77 dB）和灵活的带宽调谐范围（0.5-19 Hz低截止频率和23-138 Hz高截止频率），平均功耗为257 nW，最低分辨率为11- $ μ $ V。

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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