生物阻抗光谱应用的低噪声宽频可调放大器

2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS) Pub Date : 2019-11-01 DOI:10.1109/ICECS46596.2019.8964905

A. Márquez, N. Medrano, B. Calvo

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引用次数: 1

摘要

本文介绍了一种用于生物阻抗谱的低噪声高能效放大器。它基于电容闭环方法，提供由输入和反馈电容的比例设定的40 dB增益，也避免了直流偏移。频率范围可以通过调整较低和较高的截止频率来编程，从而实现从几百kHz到超过1 MHz的带宽。由于频率可调，功耗从6.2到39.6美元不等\ \boldsymbol{\mu}\mathbf{W}$。对于高于100 Hz的频率，噪声水平保持在$0.2\ \boldsymbol{\mu}\mathbf{V}/\mathbf{Hz}^{1/2}$以下。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Low-Noise Wide-Frequency Tunable Amplifier for Bioimpedance Spectroscopy Applications

This paper presents a low-noise energy efficient amplifier for bioimpedance spectroscopy applications. It is based on a capacitor closed loop approach that provides a 40 dB gain set by the ratio of input and feedback capacitors, also avoiding DC offsets. Frequency range can be programmed by tuning both lower and upper cut-off frequencies, therefore achieving bandwidths from few hundreds of kHz to more than 1 MHz. Due to frequency tunability, power consumption varies from 6.2 to $39.6\ \boldsymbol{\mu}\mathbf{W}$. Noise levels remain below $0.2\ \boldsymbol{\mu}\mathbf{V}/\mathbf{Hz}^{1/2}$ for frequencies higher than 100 Hz.

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2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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