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Design of a multi-frequency bio-impedance spectroscopy system analog front-end and digital back-end with on-chip implementation

机译:片上实现的多频生物阻抗谱系统模拟前端和数字后端的设计

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In this paper, the design of a Bio-Impedance Spectroscopy system is presented. The system consists of a Direct Digital Synthesis Sine-Wave Generator (DDS-SWG), an Analog Front-End (AFE), an Analog-Digital Converter (ADC), and a Digital Back-End implemented using a Field Programmable Gate Array (FPGA). The FPGA also drives the ADC, the DDS-SWG, and the LCD. The AFE consists of a high output impedance Load-In-Loop Current Source (LL-CS) and a set of High Common-Mode Rejection Ratio (CMRR) Instrumentation Amplifiers (IA). It uses a simple and straightforward impedance extraction algorithm using just division and constant multiplication. The CMOS implementation of the AFE using the TSMC 0.35um 2P4M is also presented. The system forms part of a platform that aims to predict a urolithiasis (urinary stone) event.
机译:在本文中,提出了一种生物阻抗谱系统的设计。该系统由直接数字合成正弦波发生器(DDS-SWG),模拟前端(AFE),模数转换器(ADC)和使用现场可编程门阵列( FPGA)。 FPGA还驱动ADC,DDS-SWG和LCD。 AFE由高输出阻抗环路负载电流源(LL-CS)和一组高共模抑制比(CMRR)仪表放大器(IA)组成。它使用简单且直接的阻抗提取算法,仅使用除法和常数乘法。还介绍了使用台积电0.35um 2P4M的AFE的CMOS实现。该系统构成了旨在预测尿石症(尿路结石)事件的平台的一部分。

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