摘要
提出一套基于20引脚表面贴装微控制器、SPI接口的ADC与铁电存储器、微处理器内置定时计数器完成活时间定时功能的多道分析器的袖珍化设计方法。着重介绍了脉冲峰值保持电路,MCA工作时序,以及微控制器的应用技术,其中还提出一种简洁可靠的峰值检测电路。该多道分析器样机体积为110×60×23mm3,分析分辨率最高可达16384道,在编程为1024道时,死时间为17μs。单组+5V电源供电,功耗为360mW。适合嵌入至各类现场携带式多道能谱设备中应用。
A pocket Multi-Channel Analyzer, which is based on 20 pin SMT micro-controller, Serial Peripheral Interfaced ADC and FRAM, and MCU on chip timer/counter acting as de-dead-time clock, was developed and introduced in this paper. Pulse peak hold circuit, MCA timing, micro-controller application techniques, and a reliable simple schematic for peak detection was described as well. The protocol MCA is housed in 110 60 23 mm^3. The analyzing resolution can be up to 16384 channels. The dead time is 17 μs when the resolution is programmed to be 1024 channels. It is powered from a single ＋5V supply, and the power consumption is 360 roW. It can be well embedded in various potable multi-channel spectrum equipments.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2008年第3期517-519,526,共4页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金(40374051)
成都理工大学青年科学基金(2004QJ21)共同资助
