A Multi-Channel Front-End ASIC for Pixellated Detectors

被引：2

作者：

Deng, Zhi ^{[1
,2
]}

Liu, Yinong ^{[2
]}

Zhang, Lan ^{[3
]}

Li, Yulan ^{[2
]}

Li, Yuanjing ^{[2
]}

Li, Jin ^{[4
]}

Lan, Allan Kejian ^{[5
]}

Hungerford, Ed ^{[5
]}

机构：

[1] Univ Houston, Houston, TX 77004 USA

[2] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China

[3] Nuctech Ltd, Gen Res Ctr, Beijing 100084, Peoples R China

[4] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[5] Univ Houston, Dept Phys, Houston, TX 77004 USA

来源：

2006 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOL 1-6 | 2006年

关键词：

ASIC; low-noise; front-end; CZT; GEM;

D O I：

10.1109/NSSMIC.2006.356170

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A 16-channel front-end ASIC is designed for pixellated detectors. It consists of a charge-sensitive-preamplifier(CSA), a CR-(RC)(2) shaper and a class-AB buffer for each channel. A novel continuous reset scheme for low noise and large linear range is presented. The equivalent feedback resistance can be digitally programmed by 3 decades. The shaper output width can also be adjusted from 1 mu s to 10 mu s, allowing it to be used both for low noise and high counting rate applications. The chip is implemented in 0.6 mu m CMOS process. The ENC is measured to be 1413e+20e/pF @ 1 mu s pulse width and 1402e+11e/pF @ 10 mu s pulse width respectively. The large zero-capacitance ENC is dominant by the FETs used as resistors in the shaper. The nonlinearity is less than 1.1% over an input charge range of 0-28fC using 0.1pF feedback capacitor.

引用

页码：337 / 340

页数：4

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