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刘晓艳 陆景彬 杨彦佶 陆波 王于仨 徐玉朋 崔苇苇 李炜 李茂顺 王娟 韩大炜 陈田祥 霍嘉 胡渭 张艺 朱玥 张子良 尹国和 王宇 赵仲毅 付艳红 张娅 马克岩 陈勇 《中国物理 C》2015,39(7)
Readout noise is a critical parameter for characterizing the performance of charge-coupled devices (CCDs), which can be greatly reduced by the correlated double sampling (CDS) circuit. However, a conventional CDS circuit inevitably introduces new noise since it consists of several active analog components such as operational amplifiers. This paper proposes a digital CDS circuit technique, which transforms the pre-amplified CCD signal into a train of digital presentations by a high-speed data acquisition card directly without the noisy CDS circuit, then implements the digital CDS algorithm through a numerical method. A readout noise of 3.3 e- and an energy resolution of 121 eV@5.9 keV can be achieved via the digital CDS technique. 相似文献
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