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首页> 外文期刊>International journal of circuit theory and applications >Implementation of an in-field CMOS frequency division multiplexer for 9.4T magnetic resonance applications
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Implementation of an in-field CMOS frequency division multiplexer for 9.4T magnetic resonance applications

机译：用于9.4T磁共振应用的现场CMOS频分多路复用器的实现

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摘要

This paper introduces the implementation of an application-specific complementary metal oxide semiconductor frequency division multiplexer as a novel solution to interface magnetic resonance (MR) phased arrays of micro-detectors to an image-processing unit, thus reducing the complexity and space issues associated with MR detector arrays. The frequency multiplexer, in a compact 3 x 4 mm silicon die, is designed to operate at 400 MHz, which is the Larmor frequency of H-1 protons in a 9.4-T MR imaging system. The system implements eight channels, where each channel consists of a low-noise amplifier, a frequency mixer, and a band-pass filter. The maximum gain of an individual channel after the band-pass filter stage is 38 dB. The suppression of the local oscillator ranges from 40 to -51 dB, and the maximum coupling between channels is -39 dB. The input dynamic range of an individual channel is 8 mV. Each channel consumes 54 mA from a 3.3-V source. The chip operates without errors within a high 9.4-T magnetic field. Copyright (C) 2014 John Wiley & Sons, Ltd.
机译：本文介绍了一种专用互补金属氧化物半导体频分多路复用器的实现，该实现是将微检测器的磁共振（MR）相控阵接口连接到图像处理单元的新颖解决方案，从而降低了与之相关的复杂性和空间问题MR检测器阵列。该频率多路复用器在一个紧凑的3 x 4 mm硅芯片中，设计为以400 MHz运行，这是9.4-T MR成像系统中H-1质子的拉莫尔频率。该系统实现了八个通道，其中每个通道由一个低噪声放大器，一个混频器和一个带通滤波器组成。在带通滤波器级之后，单个通道的最大增益为38 dB。本地振荡器的抑制范围为40到-51 dB，通道之间的最大耦合为-39 dB。单个通道的输入动态范围为8 mV。每个通道从3.3V电源消耗54 mA电流。该芯片可在9.4-T高磁场下正常运行。版权所有（C）2014 John Wiley＆Sons，Ltd.

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  • 来源
  • 作者

    Jouda Mazin; Gruschke Oliver G.; Korvink Jan G.;

  • 作者单位

    Univ Freiburg, Dept Microsyst Engn, Lab Simulat, IMTEK, Georges Koehler Allee 103, D-79110 Freiburg, Germany;

    Univ Freiburg, Dept Microsyst Engn, Lab Simulat, IMTEK, Georges Koehler Allee 103, D-79110 Freiburg, Germany;

    Univ Freiburg, Dept Microsyst Engn, Lab Simulat, IMTEK, Georges Koehler Allee 103, D-79110 Freiburg, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CMOS; multiplexer; high field; MRI; phased arrays;

    机译：CMOS;多路复用器;高场;MRI;相控阵;

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