高增益电荷放大器的共模反馈设计

2020 Intermountain Engineering, Technology and Computing (IETC) Pub Date : 2020-10-02 DOI:10.1109/IETC47856.2020.9249065

Yixin Song, Jace Rozsa, Joan Magalhaes, Shea Smith, Benjamin Karlinsey, W. Kinnison, Elaura Gustafson, D. Austin, A. Hawkins, S. Chiang

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引用次数: 3

摘要

介绍了一种用于电荷检测器的共模反馈电路。该放大器采用180纳米互补金属氧化物半导体(CMOS)工艺实现。放大器结合了折叠差分拓扑、有源复位和小反馈电容。这允许低噪声，高增益，高动态范围，和稳健的操作。讨论了所提出的高增益电荷放大器的CMFB的设计和分析。仿真结果表明，该环路的相位裕度为62.1度，增益裕度为25 dB。测量结果表明，该放大芯片具有稳定的共模电压。

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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Design of Common-Mode Feedback for High-Gain Charge Amplifier

We describe a common-mode feedback circuit (CMFB) for a charge detector. The amplifier is implemented in a 180-nm complementary metal-oxide-semiconductor (CMOS) process. The amplifier combines a folded differential topology, active reset, and small feedback capacitors. This allows for low noise, high-gain, high-dynamic-range, and robust operations. The design and analysis of the CMFB for the proposed high-gain charge amplifier is discussed. Simulation results show that the CMFB loop has a phase margin of 62.1 degrees and a gain margin of 25 dB. Measurement results show the amplifier chip exhibits a stable common mode voltage.

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2020 Intermountain Engineering, Technology and Computing (IETC)

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