Title :
A new detection circuit design based on DDC264
Author :
Yanbin Li ; Chuan Jin ; Xueliang Chen ; Feng Gao ; Yunfeng Shi
Author_Institution :
Dept. of Eng. of Security & Protection Syst., Chinese People´s Public Security Univ., Beijing, China
Abstract :
Aiming at the research on new x-ray detection system, the design and development of a detection circuit based on DDC264 for x-ray detection are described in this paper. This new design combines both current-to-voltage and A/D conversion, so low-level current produced by photodiodes can be directly digitized. The main features of this new circuit include: current-to-voltage and A/D conversion finished in one single-chip, which will reduce the space of detection circuit; signal digital conversion is realized at the front-end of detection system, avoiding the long distance analog transmission of signal; making use of CPLD on detection board can realize the time sequence control for DDC chip, which will make detection circuit intelligent. The module design of circuit is able to match existing interface, besides it is easy to transplant the circuit to aerospace, aviation, casting, security inspection, medical and other fields.
Keywords :
X-ray detection; analogue-digital conversion; photodiodes; A/D conversion; DDC264; current to voltage; detection circuit design; long distance analog transmission; photodiodes; signal digital conversion; x ray detection system; Circuit synthesis; Field programmable gate arrays; Immune system; Noise; Security; Universal Serial Bus; X-ray detection; DDC264; new detection circuit design; x-ray detection system;
Conference_Titel :
Electronic and Mechanical Engineering and Information Technology (EMEIT), 2011 International Conference on
Conference_Location :
Harbin, Heilongjiang, China
Print_ISBN :
978-1-61284-087-1
DOI :
10.1109/EMEIT.2011.6023330
