未找到相关数据
Sporadically-driven clock-less in-pixel multi-bit energy discriminator for X-ray spectrometry CMOS PCD imagers
被引：1
|作者：
Kim, H. -S.
[1
]
机构：
[1] Dankook Univ, Dept Display Engn, Cheonan, South Korea
关键词：
X-ray imaging;
CMOS image sensors;
X-ray spectroscopy;
low-power electronics;
photon counting;
integrated circuit design;
comparators (circuits);
discriminators;
sporadically-driven clock-less in-pixel multibit energy discriminator circuit;
X-ray spectrometry CMOS PCD imager;
photon-counting detector;
asynchronous linear search;
single-comparator;
multiple energy-bins;
material-selective imaging;
minimal linear search;
parallel search;
flash-type discriminator;
size;
130;
nm;
word length 3 bit;
power;
1;
muW;
voltage;
3;
V;
2;
6 mV to 3;
mV;
DETECTOR;
ARRAYS;
D O I：
10.1049/el.2016.2629
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 compact size and low-power multi-bit energy discriminator circuit is presented for X-ray spectrometry CMOS photon-counting detector (PCD) pixels. Because the circuit design is based on an asynchronous linear search, the discriminator with only a single-comparator classifies a sporadically incoming photon into multiple energy-bins, resulting in high spatial resolution and functionality of material-selective imaging. The proposed pixel power required to perform a minimal linear search is significantly less than the power of a conventional parallel search implemented in a flash-type discriminator. A prototype is fabricated in a 130-nm CMOS, and a 3-bit discriminator occupies only 23 x 60 m(2). The circuit dissipates a static power of 1 W with a power supply of 3.3 V (analogue) and 1.2 V (digital). The inaccuracy of energy-binning is measured to be 2.6-3.3 mV rms.
引用
收藏
页码：1590 / 1592
页数：2
相关论文