具有高速缓冲PCI接口的500k事件/秒12位ADC系统

V. Zavarzin, W.A. Earle
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引用次数: 12

摘要

设计并测试了流行的LeCroy 2249系列充电集成adc的低成本替代品,其数据吞吐量提高了100倍以上。设计中使用的A/D转换芯片提供700 nsec的转换时间,由双绞线带状电缆组成的25 MHz/32位并行总线连接到高速缓冲PCI接口,能够将100 MByte/sec的数据传输到普通IBM PC。每个ADC通道的前端都配备了一个单极基线恢复电路,允许在非常高的信号速率下使用交流耦合(RF前置放大器,高压去耦信号源,如pmt,线室等)。该系统是为正电子发射断层扫描而开发的,也可用于一系列高能物理应用、光谱学、医学成像和其他高事件发生率的领域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A 500 k event/sec 12-bit ADC system with high-speed buffered PCI interface
A low-cost replacement for popular LeCroy 2249 series charge-integrating ADCs with more than 100 times faster data throughput is designed and tested. The A/D converter chips used in the design provide 700 nsec conversion time and 25 MHz/32-bit parallel bus made of a twisted pair ribbon cable connected to a high-speed buffered PCI interface is capable of 100 MByte/sec data transfer to an ordinary IBM PC. The front-end of each ADC channel is equipped with an unipolar Baseline Restoration Circuit allowing use of AC coupling at very high signal rates (RF preamplifiers, HV decoupled signal sources like PMTs, wire chambers, etc.). Being developed for Positron Emission Tomography, the system could also be used for a range of High Energy Physics applications, Spectroscopy, Medical Imaging and others where high event rate occurs.
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