论文标题
为CDTE探测器的低噪声前端ASIC开发
Development of a Low-noise Front-end ASIC for CdTe Detectors
论文作者
论文摘要
我们介绍了最新的ASIC，该ASIC用于读数池尿酸双面条探测器（CDTE DSD）和高光谱成像。它在0.35 UM CMOS技术（X-FAB XH035）中实现，由64个读取频道组成，并且具有对每个频道执行同时进行广告转换的函数。测量54.9 E- +/- 11.3 E-（RMS）的等效噪声电荷，而无需将ASIC连接到任何检测器。从使用CDTE单侧带状探测器的光谱测量值，在13.9 KeV处获得1.12 KeV（FWHM）的能量分辨率，并在能量中从6.4 keV到122.1 keV中获得了光子。根据实验结果，我们提出了一种新的低噪声读数架构，利用在塑造器上使用驱动率有限模式，然后使用峰值检测器电路。
We present our latest ASIC, which is used for the readout of Cadmium Telluride double-sided strip detectors (CdTe DSDs) and high spectroscopic imaging. It is implemented in a 0.35 um CMOS technology (X-Fab XH035), consists of 64 readout channels, and has a function that performs simultaneous AD conversion for each channel. The equivalent noise charge of 54.9 e- +/- 11.3 e- (rms) is measured without connecting the ASIC to any detectors. From the spectroscopy measurements using a CdTe single-sided strip detector, the energy resolution of 1.12 keV (FWHM) is obtained at 13.9 keV, and photons within the energy from 6.4 keV to 122.1 keV are detected. Based on the experimental results, we propose a new low-noise readout architecture making use of a slew-rate limited mode at the shaper followed by a peak detector circuit.
