共查询到19条相似文献,搜索用时 31 毫秒
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Samuel Lai 《世界电子元器件》2001,(8):11-12
回顾20多年前,DRAM(动态读写存储器)之所以被采用为电脑存储的重要因素,其实是DRAM的性能及频宽能满足当时CPU需求所致。之后,由于CPU及系统性能的提升,DRAM的技术由Fast Page Mode(快速页面模式)DRAM,EDO DRAM(扩展数据输出)发展到同频式的SDRAM(静态随机存取存储器),PCB内存条在这个过程中其速度也由PC66,PC100提升到几年前才开始盛行的PCB内存条,从这个过程可以清楚地看出成本一直是主宰新技术取代旧技术的主要原因,而频宽则是相对主要的关键。 相似文献
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前言 几乎每一个电子设备,从智能手机到服务器,都使用了某种形式的RAM存储器.尽管闪存NAND继续流行(由于各式各样的消费电子产品的流行),由于SDRAM为相对较低的每比特成本提供了速度和存储很好的结合,SDRAM仍然是大多数计算机以及基于计算机产品的主流存储器技术. 相似文献
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随着数字化技术、集成电路的高速发展,数字存储示波器以其强大的测试能力、稳定的性能和更快捷的数据处理方式越来越多的应用于科研生产中,已成为检测电子线路最有效的工具之一. 相似文献
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《Electronics letters》2008,44(19):1121-1123
A multi-phase digital delay-locked loop (DLL) capable of a low-jitter feature for DDR memory interface is reported. The DLL repeatedly selects the output clock edge which is closest to the reference clock edge to reduce the total jitter. A test chip was fabricated in a 0.18 mm CMOS process to verify its functionality. The measured RMS and peak-to-peak jitter of the DLL are 6.2 and 20.4 ps, respectively. The power consumption of the DLL is 12 mW from a 1.8 V supply voltage. 相似文献
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Due to the complexity of IC, electromagnetic immunity plays a critical role towards evaluating the EMC performance to avoid the high cost of redesign. This paper focuses on the Direct Power Injection (DPI) immunity of processor chips with different external double data rate3 (DDR3) synchronous dynamic random access memory (SDRAM) in consumer electronics. To complete the DPI test, a test board complying with the standard IEC62132-4 and a dedicated test code have been designed. The effect of DC power injection interference on same DDR model but different DDR pins and the same DDR pin but different DDR models were analysed, the results can be used to locate the system-level EMC issues and optimize the design. 相似文献