【摘要】 本系统以新的数据存取方式——“DMA+N”取代古典的多道分析器(MCA)存取方式——“DMA+1”。N是计数换失修正权重因子。计数换失修正方法是基于虚拟脉冲发生器原理,修正工作用硬件实现,不需占用机器时间,从而优越于软件修正,可工作于高计数率。更多还原

【Abstract】 A new kind of "ADC-Memory" (ADC-M) with real time correction of counting loss in dead time is now used in a multiuser data acquisition and processing system based on DUAL/68000 microcomputer. In data access, it replaces the "DMA+1" in classical MCA with the new method "DMA+1" , where N is a weight factor of correction. The new method is based on the principle of virtual pulse generator, This method is superior to the correction by the software because the correction needn’t to take the computer time. Thus, this ADC-M can be used in the counting of high rate pulses.更多还原