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某型飞机导弹模拟器的原理与实现 被引量:4
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作者 齐晓林 冀捐灶 +2 位作者 崔功 史军勇 冯金富 《火力与指挥控制》 CSCD 北大核心 2002年第z1期48-49,58,共3页
介绍了利用新型电子器件实现的某型飞机武器控制系统导弹模拟器 ,并给出了其详细工作原理 ;重点介绍了部分关键性电路的原理、具体线路等。该模拟器的实现具有较高的经济和军事价值。
关键词 武器控制系统 导弹模拟器 无外接rc延时器 定时器
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Fast statistical delay evaluation of RC interconnect in the presence of process variations
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作者 李建伟 董刚 +1 位作者 杨银堂 王增 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2010年第4期104-108,共5页
Fast statistical methods of interconnect delay and slew in the presence of process fluctuations are proposed. Using an optimized quadratic model to describe the effects of process variations, the proposed method enabl... Fast statistical methods of interconnect delay and slew in the presence of process fluctuations are proposed. Using an optimized quadratic model to describe the effects of process variations, the proposed method enables closedform expressions of interconnect delay and slew for the given variations in relevant process parameters. Simulation results show that the method, which has a statistical characteristic similar to traditional methodology, is more efficient compared to HSPICE-based Monte Carlo simulations and traditional methodology. 展开更多
关键词 process variations rc delay static delay
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Frequency dependence on polarization switching measurement in ferroelectric capacitors
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作者 Zhaomeng Gao Shuxian Lyu Hangbing Lyu 《Journal of Semiconductors》 EI CAS CSCD 2022年第1期90-94,共5页
Ferroelectric hysteresis loop measurement under high driving frequency generally faces great challenges.Parasitic factors in testing circuits such as leakage current and RC delay could result in abnormal hysteresis lo... Ferroelectric hysteresis loop measurement under high driving frequency generally faces great challenges.Parasitic factors in testing circuits such as leakage current and RC delay could result in abnormal hysteresis loops with erroneous rem-nant polarization(P_(r))and coercive field(E_(c)).In this study,positive-up-negative-down(PUND)measurement under a wide fre-quency range was performed on a 10-nm thick Hf_(0.5)Zr_(0.5)O_(2) ferroelectric film.Detailed analysis on the leakage current and RC delay was conducted as the polarization switching occurs in the FE capacitor.After considering the time lag caused by RC delay,reasonable calibration of current response over the voltage pulse stimulus was employed in the integral of polarization current over time.In such a method,rational P-V loops measured at high frequencies(>1 MHz)was successfully achieved.This work provides a comprehensive understanding on the effect of parasitic factors on the polarization switching behavior of FE films. 展开更多
关键词 PUND measurement HfO_(2)-based ferroelectric rc delay
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Frequency equation for the submicron CMOS ring oscillator using the first order characterization
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作者 Aravinda Koithyar T.K.Ramesh 《Journal of Semiconductors》 EI CAS CSCD 2018年第5期64-69,共6页
By utilizing the first order behavior of the device,an equation for the frequency of operation of the submicron CMOS ring oscillator is presented.A 5-stage ring oscillator is utilized as the initial design,with differ... By utilizing the first order behavior of the device,an equation for the frequency of operation of the submicron CMOS ring oscillator is presented.A 5-stage ring oscillator is utilized as the initial design,with different Beta ratios,for the computation of the operating frequency.Later on,the circuit simulation is performed from 5-stage till 23-stage,with the range of oscillating frequency being 3.0817 and 0.6705 GHz respectively.It is noted that the output frequency is inversely proportional to the square of the device length,and when the value of Beta ratio is used as 2.3,a difference of 3.64%is observed on an average,in between the computed and the simulated values of frequency.As an outcome,the derived equation can be utilized,with the inclusion of an empirical constant in general,for arriving at the ring oscillator circuit’s output frequency. 展开更多
关键词 ring oscillator stage delay SPICE model rc model second order effects
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