一种用于0.13µm BiCMOS中x核核波谱的宽带收发器ASIC

Frederik Dreyer, Daniel Krüger, Sander Baas, A. Velders, J. Anders
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引用次数: 6

摘要

在本文中,我们提出了一种用于多核核磁共振(NMR)测量的全集成收发器ASIC (NMR-on-a-chip),工作频率高达770 MHz。片上核磁共振收发器协集成了一个低中频接收器,由低噪声放大器、正交下变频混频器、中频可变增益放大器、功率放大器和频率产生块组成。ASIC采用0.13µm SiGe BiCMOS技术实现,芯片总面积为1100×900µm2。功率放大器的最大峰对峰输出电流为ITX,pp = 210 mA。接收机链的最大转换增益为ARX = 66 dB,最小输入参考噪声为${v_{{\text{n,min}}}} = 610{\text{pV}}/\sqrt {{\text{Hz}}} $。芯片的性能也在目标NMR应用中得到验证,其中所提出的系统实现了最先进的归一化自旋灵敏度为$8.3 \倍{10^{17}}{\text{spins}}/\sqrt {Hz} \cdot {{\text{T}}^2}{\text{m}}$。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A broadband transceiver ASIC for X-nuclei NMR spectroscopy in 0.13 µm BiCMOS
In this paper, we present a fully-integrated transceiver ASIC (NMR-on-a-chip) for multi-nuclei nuclear magnetic resonance (NMR) measurements with operating frequencies up to 770 MHz. The NMR-on-a-chip transceiver co-integrates a low-IF receiver, consisting of a low-noise amplifier, quadrature down-conversion mixers followed by intermediate-frequency variable gain amplifiers, a power amplifier, and a frequency generation block. The ASIC is realized in a 0.13 µm SiGe BiCMOS technology and occupies a total chip area of 1100×900 µm2. The power amplifier has a maximum peak-to-peak output current of ITX,pp = 210 mA. The receiver chain has a maximum conversion gain of ARX = 66 dB with a minimum input-referred noise of ${v_{{\text{n,min}}}} = 610{\text{ pV}}/\sqrt {{\text{Hz}}} $. The chip performance is also verified in the target NMR application, in which the presented system achieves a state-of-the-art normalized spin sensitivity of $8.3 \times {10^{17}}{\text{spins}}/\sqrt {Hz} \cdot {{\text{T}}^2}{\text{m}}$.
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