02 / TIA LITERATURE

A Transceiver for NMR Field Probes Integrated in a Low-Power CMOS Process

TIAISCAS2025组员文献

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会议: IEEE ISCAS 2025
DOI: https://doi.org/10.1109/iscas56072.2025.11043572
原文: paper.pdf

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核心参考量

维度	信息
应用场景	MRI/NMR field probe transceiver
是否实测	Silicon measured
工艺节点	65
前端架构	Low-IF quadrature receiver with TIAs
关键性能条件	3T/7T MRI；143 Vpp发射
可参考程度	低相关

设计挑战

应用约束：MRI/NMR field probe transceiver。
核心电路矛盾：TIA处于低IF接收机链中，与混频、正交解调共同定义性能，而不是单独跨阻优化。
指标与实现约束：3T/7T MRI；143 Vpp发射。这些数值必须同时结合输入电容、输出负载、供电与验证频率判断，不能只比较单个峰值指标。

架构创新点

1. 前端拓扑

Low-IF quadrature receiver with TIAs。该拓扑决定输入阻抗、反馈环路和主要噪声源，也是判断能否迁移到阵列读出的第一层依据。

2. 关键机制

标准低功耗CMOS集成高压激励和低噪声接收

3. 与传统方案的差异

TIA处于低IF接收机链中，与混频、正交解调共同定义性能，而不是单独跨阻优化。

性能与证据

项目	判断
工艺	65
验证方式	Silicon measured
关键性能	3T/7T MRI；143 Vpp发射
证据等级	验证方式需继续核实
参考程度	低相关

原文摘要证据：This paper presents a CMOS transceiver for field monitoring in magnetic resonance imaging (MRI) scanners. The integrated circuit (IC) is optimized for usage in magnetic field strengths of 3 T and 7 T. The transceiver integrates a transmitter capable of exciting a nuclear magnetic resonance (NMR) field probe up to a peak-to-peak voltage of 143 V thanks to a resonant tank. This NMR-on-a-chip also implements a low-IF quadrature receiver. The receiver, including transimpedance amplifiers (TIA) and measurement output buffers, consumes only 14.1 mW. The measured signals acquired in √ a full-body scanner result in an input-referred noise of 390 pV/ Hz owing to a resonant network passively amplifying the probe signal to the low-noise amplifier (LNA) input. The overall transceiver is integrated into a 65 nm CMOS process covering a total area of 1.5 mm2 .