3 . a good result is gotten under the star - hspice simulation . the dc gain is 90 db , the offset voltage is 40 u v while driving 10k , the unity - gain frequency is 10mhz with phase margin 67 , the slew rate is 10w us while driving 10pf 用star - hspice仿真软件对电路仿真，在1 . 5v电源电压、直流10k负载、交流10pf负载的情况下，整个共模电压范围内跨导基本保持恒定，只有18的变化，直流增益90db ，单位增益带宽10mhz ，相位裕度80度，压摆率10v s 。
This paper is based on the research of rf theory . according to a lot of medical research , this paper finds the waveform and frequency of treating brain tumors . after system simulation and circuit design , the assembly work of the first generation of brain tumors has been finished 本文在完成对射频理论深入研究基础上,根据医学大量研究找出的适合于治疗脑组织的波段,并且利用软件进行系统仿真和电路仿真验证了设计思想,最终设计组装完成第一代的治疗仪。
First of all , a chaos control method based on variable ' s differential feedback is presented and applied to control chaos on chaotic chua ' s circuit . and then based on this chaos control method , two schematic circuits are designed , i . e . continuous differential feedback realization and impulse differential feedback realization . the circuit simulations are consistent with the theoretical analysis and numerical simulations 首先针对混沌chua电路提出了应用变量的微分反馈控制混沌的方法，并设计了基于该方法的两种电路实现方案，即连续微分反馈控制电路实现和脉冲微分控制电路实现，电路仿真的结果与理论分析和数值模拟具有很好的一致性。
By using the measure and research of the emulating two - port network parameters of using direct - current analysis and figure value output function of sinusoidal steady state circuit in circuit emulating software pspice8 . 0 , the measure and research have solved the problem of the measuring purely resistive network of simple and odd one in traditional experimient , and also brought about the analysis of alternating current and direct - current for two - port network of any one complex and measure and research of y 、 n 、 z 、 t 、 h and so on parameters , and this opens up one new path for many traditional experimient of not easy to fulfil and for the complex circuit 摘要利用电路仿真软件pspice8 . 0中直流分析及正弦稳态电路的数值输出功能仿真二端口网络参数的测量与研究，解决了传统实验中只能测量简单、单一的纯电阻网络问题，实现了对任一复杂二端口网络交、直流的分析及y 、 z 、 t 、 h等参数的测量与研究，为更多的不易完成的传统实验以及复杂电路的分析研究开辟了一条新路。
Utilizing the design of external shell , dual axis capacitive accelerometer was succeeded , and the sensitive properties were characterized and analyzed . with the assistance of signal processing circuit consisted of amplifier circuit and filter circuit , the signal from the sensitive chip is converted into the voltage signal that meets the product performance requirement . moreover , we employed micromechanical technique to fabricate the 后端信号处理电路通过放大电路及滤波电路,将敏感芯片输出的电压信号转换成符合产品性能指标的电压信号,经过电路仿真及实验验证了电路的可行性;利用精密机械加工技术制作的外壳使得传感器整体化、小型化;对产品实际性能测试和环境试验后表明,该传感器主要技术指标满足设计要求。
This dissertation brings forward a new method of modeling and simulation on interconnect ? fem - vfm , which combines finite element method with vector fitting method . we can get the scatter / admittance / impedance ( s / y / z ) parameter by fem in frequence domain , gain the equivalent spice circuits of interconnect structure by vfm , and extract the circuit ’ s parameters which are used to analyze in time domain . this method lets the simulation not only contain the information of pcb ’ s structure but also have a sustainable computing speed 首先通过电磁场数值分析方法?有限元法( fem )对互连结构进行仿真分析,而得到的散射/导纳/阻抗矩阵参数( s / y / z矩阵参数) ,然后通过矢量拟合方法( vfm )把s / y / z矩阵参数转化为等效spice等效电路模型,并且提取出电路参数,完成了频域到时域的转换,最后使用电路仿真器进行时域仿真,从而开发出了一系列高速数字pcb板设计规则。
In microstrip pin switch design , we use the circuit simulation method , firstly we use full - wave analysis method to extract s matrix of passive components ; and then we use ads to analysis and optimize the entire circuits . the test result shows good agreement of the simulation result 在研究方法上,利用电路分析的方法,由全波分析软件生成无源部分的s参数,然后将其结果导入到电路仿真软件中,实际设计并制作了ka波段微带单刀三掷pin开关,设计结果很好的证明了仿真过程的可行性。
