用于尘埃粒子探测器的全差分电荷敏感放大器

2018 14th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME) Pub Date : 2018-07-01 DOI:10.1109/PRIME.2018.8430334

S. Kelz, Thomas Veigel, M. Grozing, M. Berroth

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引用次数: 0

摘要

本文介绍了一种工作频率为7hz ~ 300khz的全差分电荷敏感放大器的设计和测量。与典型的单输入晶体管拓扑结构相比，所示差分方法极大地简化了共模噪声的抑制。推导了全差分电荷敏感放大器的原理以及反馈电阻和输入晶体管正确尺寸的解析规则。最后，提出了一种双级联码放大器，在5.4 pF差分检测器电容下，在7 Hz至300 kHz频段实现了114个基本电荷rms的等效噪声电荷。该放大器采用$0.35~\mu \math {m}$标准CMOS技术实现，在3.3 V电源电压下功耗为26.4 mW。

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A Fully Differential Charge-Sensitive Amplifier for Dust-Particle Detectors

This paper presents the design and measurements of a fully differential charge sensitive amplifier operating in the frequency range from 7 Hz to 300 kHz. In comparison to the typically employed single input transistor topology, the shown differential approach greatly simplifies the suppression of common mode noise. The theory of the fully differential charge sensitive amplifier and analytical rules for the correct sizing of the feedback resistor and the input transistor are derived. Finally a double-cascode-amplifier is presented, achieving an equivalent noise charge of114 elementary charges rms in the 7 Hz to 300 kHz frequency band at 5.4 pF differential detector capacitance. The amplifier is realized in a $0.35~\mu \mathrm {m}$ standard CMOS technology and consumes 26.4 mW at 3.3 V supply voltage.

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2018 14th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME)

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