Efficient design of rotary traveling wave oscillator array via geometric programming     

Li-jia Chen  Hua-feng Zhang  Jin-fang Zhou  Kang-sheng Chen 《浙江大学学报(A卷英文版)》2009,10(12):1815-1823

This paper presents an efficient method for globally optimizing and automating component sizing for rotary traveling wave oscillator arrays. The lumped equivalent model of transmission lines loaded by inverter pairs is evaluated and posynomial functions for oscillation frequency, power dissipation, phase noise, etc. are formulated using transmission line theory. The re- sulting design problem can be posed as a geometric programJning problem, which can be efficiently solved with a convex opti- mization solver. The proposed method can compute the global optima more efficiently than the traditional iterative scheme and various design problems can be solved with the same circuit model. The globally optimal trade-off curves between competing objectives are also computed to carry out robust designs and quickly explore the design space.  相似文献   

电话交换机的热备份技术概述     

查洪球 《科技广场》2012,(1):216-218

本文详细介绍了电话交换机技术中的电源热各份和控制单元热备分技术中的基本原理,以利于同行进行优化和改进。  相似文献   

带日历时钟的实时温度检测系统设计     

郑春来  韩团军  贾建科 《科技广场》2011,(7):123-126

电子万年历是单片机系统的一个应用,本设计由硬件和软件两部分组成,硬件由主控器、时钟电路、温度检测电路、显示电路、键盘接口5个模块组成,主控模块用AT89C52、时钟电路用时钟芯片DS12C887、显示模块用LCD、温度检测采用DS18B20温度传感器、键盘接口电路用普通按键完成;软件利用C语言编程实现,单片机通过时钟芯片DS12C887获取时间数据,DS18B20采集温度信号送给单片机处理,然后通过LCD显示阳历年、月、日、时、秒、闹钟、星期、温度。  相似文献