多路电荷灵敏前置放大器

介绍了一种多路电荷灵敏前置放大器,其路数最多为8路,它有功耗低,体积小,价格低廉,使用方便等特点,并对它的设计以及特点作了较详细的阐述.     

一种新型的8路电荷灵敏前置放大器

本文介绍了一种新型专用的多路电荷灵敏前置放大器,其路数最多为八路,这种电荷灵敏置放大器采用新的设计方案,该前放主要采用低噪声场效应晶体管和集成运算放大器构成,其等效输入噪声小于等于2．2 keV。该前放具有电路结构简单、体积小、输出信号上升时间快、噪声低、稳定性好等特点。并对它的设计以及特点作了较详细的阐述。     

CMOS low-noise switched charge sensitive preamplifier for CdTe andCdZnTe X-ray detectors

CdTe and CdZnTe X-ray detector arrays for imaging and spectroscopy provide low capacitance current sources with low leakage currents. The optimal shaping time for low-noise operation is relatively high in CMOS analog channels that provide the readout for these detectors. The shaper is centered at lower frequencies, and thus the 1/f noise from the electronics is the main noise source that limits the resolution of the channel. The optimal dimensions of the input stage MOSFET are determined by this noise. In this paper a design criterion for the optimization of the resolution and the power consumption in a 1/f noise dominated readout is introduced. A readout based on CMOS switched charge sensitive preamplifier without feedback resistor has been designed and fabricated in the CMOS 2-μ low-noise analog process provided by MOSIS. This design provides high sensitivity and the possibility to integrate a large number of channels with low power consumption. Measurements of the performance of a first prototype chip are presented     

用于CZT探测器信号读出的低噪声电荷灵敏前放A250

本文测量和分析了电荷灵敏前放A250的电子学噪声对CZT探测器能谱展宽的影响.在成形时间下1 μs下A250的零电容噪声为104.8 e,噪声电容斜率为4.18 e/pF.测得241Am 59.5 kev全能峰能量分辨率为4.08%.     

一种低噪声快电荷灵敏前置放大器的研制

简要介绍了新型低噪声快电荷灵敏前置放大器。这种电荷灵敏前置放大器采用新的设计方法案，该前放主要采用低噪声场效应晶体管和集成运算放大器构成，其等效输入噪声≤2．2keV。该前放具有电路结构简单、体积小、输出信号上升时间快、噪声低、稳定性好等特点。     

低噪声脉冲光反馈电荷灵敏前置放大器的进展

本文介绍用于低能X射线Si(Li)谱仪低噪声脉冲光反馈电荷灵敏前置放大器的进展,其零电容电子学噪声FWHM=85-110eV(对Si),并给出实验结果。     

A250电荷灵敏放大器的性能和设计制作

阐述了A250混合集成电荷灵敏放大器的特性、性能指标和应用，以及它的参数测量方法，给出了具体应用中设计的电路。     

用于硅多条阵列探测器的48路前置电荷灵敏放大器的研制

介绍了一套用于硅多条阵列探测器中的高密度多通道电荷灵敏放大器的研制和阵列探测器电子学的发展现状和工作原理,提出了设计原则和设计思路,特别介绍了一个新开发的用于硅多条探测器中的48路电荷灵敏前置放大器的设计和实际测量结果.它具有低成本、高密度的特点,好于1%的能量分辨和良好的长期稳定性.     

改进的CMOS电荷灵敏前放噪声优化设计方法

CMOS专用集成电荷灵敏前放的噪声性能对于辐射探测非常关键.提出了一种改进的CMOS电荷灵敏前放低噪声设计方法,通过实例计算得到的噪声结果比现有方法都有不同程度的提高.     

两种用于氡气测量装置的电荷灵敏前置放大器的研制

介绍了两种用于氡气测量装置的电荷灵敏前置放大器的实例,给出了设计思想、调试过程和技术指标,说明了它们不同的应用场合。     

A four-channel, low-power CMOS charge preamplifier for silicondetectors with medium value of capacitance

We present a low-power CMOS charge preamplifier, suitable for use with silicon detectors having a medium value of capacitance. Noise considerations and a long decay time of the output signal command the use of unusually large devices such as an input transistor having W=10000 μm and a 7-MΩ feedback resistor. Both of these devices were integrated inside the chip. We present and compare theoretical predictions together with the results of post-layout simulation and the measurements obtained     

A low noise charge sensitive preamplifier with switch control feedback resistance

In this paper, the design and analysis of a new low noise charge sensitive preamplifier for silicon strip, Si（Li）, CdZnTe and CsI detectors etc. with switch control feedback resistance were described, the entire system to be built using the CMOS transistors. The circuit configuration of the CSP proposed in this paper can be adopted to develop CMOS-based Application Specific Integrated Circuit further for Front End Electronics of read-out system of nuclear physics, particle physics and astrophysics research, etc. This work is an implemented design that we succeed after a simulation to obtain a rise time less than 3ns, the output resistance less than 94Ω and the linearity almost good.     

硅多条阵列探测器多路电荷灵敏前置放大器研制

本文简要介绍了应用于阵列探测器特别是硅多条阵列探测器的高密度多路前置放大器和前端电子学的发展现状、工作原理、设计要求和设计思路.同时,介绍了一套新开发的用于硅多条探测器中的48路电荷灵敏前置放大器的电路设计和实际测量结果,它具有低成本、高密度、好于1%的能量分辨和良好的长期稳定性.     

便携式X荧光分析仪前置放大器的设计

介绍了一种新型高速低噪声器的电荷灵敏前置放大器,该放大器已应用于便携式X射线荧光分析仪中,它具有电路结构简单、性能可靠、线性度较好、输出信号上升时间快、噪声低等特点,有较好的性能价格比。     

Monolithic junction field-effect transistor charge preamplifier forcalorimetry at high luminosity hadron colliders

The outstanding noise and radiation hardness characteristics of epitaxial-channel junction field-effect transistors (JFET) suggest that a monolithic preamplifier based on them may be able to meet the strict specifications for calorimetry at high luminosity colliders. Results obtained so far with a buried layer planar technology, among them an entire monolithic charge-sensitive preamplifier, are described. Tests have demonstrated that the noise behavior of the preamplifier is close to that which would be expected if the total noise referred at the preamplifier input were the thermal noise in the input JFET device; that is, the monolithic circuit approaches the noise performances of a hybrid preamplifier using discrete JFETs     

一种新型电荷灵敏前置放大器和成形峰保持混合电路

本文介绍一种我们研制的新型电荷灵敏前置放大器和成形放大与峰保持混合电路,该电路采用了新的设计方案,它采用电荷灵敏前置放大器将探测器信号预放大后,再经过放大成形和峰值保持,以便后继电路采样和进行数据的处理.放大器信号成形时间为0.5 μs;1μs;2μs三档可调,放大倍数为×10;×100两档选择,峰保持时间为6μs,它具有噪声低;体积小;电路结构简单;价格低等特点,并且对整个电路做了较详细的阐述.     

A low-noise current-sensitive preamplifier for X-ray computed tomography with applying a charge-sensitive preamplifier

ABSTRACT

A low-noise current-sensitive preamplifier was developed for aiming low-dose X-ray computed tomography with applying a charge-sensitive preamplifier. We compared the number of X-ray photons needed for current measurement with the new preamplifier with that needed with a conventional preamplifier. Also, the dose rates for above conditions were measured by a commercial dose rate meter. Results show that the new preamplifier reduced the number of X-ray photons needed by two orders of magnitude compared with the conventional one.     

Design and simulation of charge sensitive preamplifier with CMOS FET implemented as feedback capacitor Cfp

In this paper,to design a new preamplifier for optimum performances with charged-particle or heavy-ion detectors,the CMOS FET is implemented as a feedback capacitor Cfp.so that the entire system should be built only with MOSFET.This work is a revolution design because to realize an ASIC for a preamplifier circuit,the capacitor will also be included.We succeed after a simulation to maintain a rise time less than 3 ns,the output resistance less than 94 Ω and the linearity almost good.     

用于辐射成像探测器的集成前置放大器电路

介绍了辐射成像探测器陈列的电流积分型前置放大器。并推荐３种用于辐射成像陈列探测器的集成前置放大器阵列电路,ＨＸ２、ＭＸ３和、ＭＸ４,前者为１６路阵列,后两种为１２８路阵列。