An electronically tunable multi-mode filter structure with feedback topology for the HF applications in multi-standard receivers

IF 3.2 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-17 DOI:10.1016/j.aeue.2025.155955

Keziban Erkal , Abdullah Yesil , Deniz Ozenli

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引用次数: 0

Abstract

This work proposes a new 2nd order MOSFET-C filter circuit using only three MOSFETs in its core. The single-input multiple-output design provides current-mode (CM) and transresistance mode (TRM) low-pass (LP) and bandpass (BP) filters. A feedback loop using an OTA circuit enhances filter characteristics by improving the quality factor and increasing gain. This study is the first to apply feedback to a MOSFET-C-based filter for performance enhancement. The feedback circuit consists of six MOSFETs, adding only 200 µW power consumption without degrading performance. The circuit is electronically tunable, free from body effect, uses grounded capacitors, and operates at ± 0.9 V, making it suitable for low-voltage applications. Simulations were performed using TSMC 0.18 µm technology for both non-feedback and feedback structures. Monte Carlo analysis, THD responses, and input-referred noise equations were obtained. Post-layout simulations showed layout areas of 2887.2 µm² (non-feedback) and 6381.9 µm² (feedback). Experimental PCB implementations confirmed agreement with theoretical calculations and simulations. Thermal analysis showed no significant heat emissions. The results demonstrate that this architecture is well-suited for high-frequency (HF) applications in wireless receivers.

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一种用于多标准接收机高频应用的带反馈拓扑的电子可调谐多模滤波器结构

本文提出了一种新的二阶MOSFET-C滤波电路，其核心仅使用三个mosfet。单输入多输出设计提供电流模式（CM）和跨电阻模式（TRM）低通（LP）和带通（BP）滤波器。使用OTA电路的反馈回路通过改善质量因子和增加增益来增强滤波器特性。本研究首次将反馈应用于基于mosfet - c的滤波器以增强性能。反馈电路由6个mosfet组成，在不降低性能的前提下仅增加200µW的功耗。该电路可电子调谐，不受体效应影响，使用接地电容器，工作电压为±0.9 V，适用于低压应用。采用TSMC 0.18µm技术对非反馈和反馈结构进行了仿真。得到了蒙特卡罗分析、THD响应和输入参考噪声方程。布局后仿真显示，布局面积为2887.2µm2（非反馈）和6381.9µm2（反馈）。实验PCB实现证实了理论计算和模拟的一致性。热分析显示没有明显的热排放。结果表明，该结构非常适合于无线接收机中的高频应用。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.