【作者】 杨军； 贾艳； 王子斌； 陈长龄；

【Author】 Yang Jun Jia Yan Wang Zibin Cheng Changling (School of Automation Engineering,UESTC,Chengdu 610054,China)

【机构】 电子科技大学自动化工程学院；

【摘要】 本文给出了一种以可编程器件 LMX2531为核心、以 ARM 器件作为整个电路控制中心的宽带示波器数据采集系统的高频时钟电路设计。本文介绍了美国国家半导体公司的 LMX2531器件的性能,较为详细地阐述了 LMX2531器件的可编程特点以及各个控制寄存器的控制位意义,同时也指出了对 LMX2531器件编程的要点。该高频时钟发生电路同时利用 SA- MSUNG 公司的 ARM 器件 S3C44B0X 为控制中心,在 ADS 开发环境下对 LMX2531器件进行编程控制。本文还给出了该电路的部分硬件电路和编程软件,最后还给出了时钟波形图。该时钟发生电路具有可编程,发生时钟频率高、功耗小、精度高、调试方便以及可靠性高等优点,对于现代高速数字存储示波器的设计具有重要的意义和广泛的应用价值。更多还原

【Abstract】 In this paper,a high frequency clock generation circuit for data sample system of a broad band DSO is in- troduced.A programmable device LMX2531 acts as the kernel of the whole system,and an ARM device plays the control center.At first,the characteristics of NS corp’s LMX2531 devices are provided,and the features of its pro- grammable and the every controller hit meaning of every register are emphasized,in the meanwhile,the keys of programming are gived too.And then,the ARM device,SAMSUNG S3CA4B0,is selected as the control center of the whole clock generation circuit,programming the LMX2531 device under the ADS.At last,the partial hardware and software and the clock wave graph are provided in the end of the paper.This clock generation circuit has many better advantages,such as programmable,high generation frequency,low power,debugging facility,high preci- sion,high credibility,and so on.This design method has important signification and vital application value for the design of the modern high speed DSO.更多还原