最新刊期
卷 ， 期 2 ， 1993
- 摘要：By tracing the crucial points defining the hysteresis loop of the inhomogeneously pumped semiconductor lasers, the absorptive optical bistablity has been studied. Analytical expressions for the output power and the threshold current at the switch-on and off have been derived, and the relationship between the cross-sections of the media with the measured power and threshold current has been established, thus the messurements of these cross-sections are simplifed greatly.关键词：Point tracing method;Absorptive optical bistablity;Inhomogeneously pumped semiconductor lasers2|22|0更新时间：2025-12-08
- 摘要：A simplifing equation, which can give sencond order temperature effects of silicon integration MOSFET from 27 to 300℃, has been presented by this paper. It is used to improve the ZTC model of MOSFET which works at wide operation temperature range and very high temperatures. The data indicates that the error of theoretical and experimentical values in saturation region has been reduced from more of 29% to less of 8%.The theoretical analysis and experimentical results have shown that the conclusion is correct.关键词：High temperature;MOSFET;Silicon integrated circuits2|108|2更新时间：2025-12-08
- 摘要：In this paper, The general expressions on common emitter DC Current gain hFE, emitter Gummel number Ge and current gain enhancement factor K of polysilicon emitter transistor （PET） have been derived in the analytical forms for a complete structure of PET by considering various factors which affect the current gain of PETs. The various device structure of PETs can be unified in these general expressions, and according to these expressions, PETs with the different device structure are classified scientifically. These general expressions include Ning’s and Graaff’s theoretical results.关键词：Polysilicon emitter transistor（PET）;Bipolar transistor;Device physical models4|48|2更新时间：2025-12-08
- 摘要：In this paper, the effect of difference sampling number on discriminability and sensitivity has been discussed for OCRS. An optimum seeking principle is given for difference sampling number, k, in OCRS analysis. An improvement on both discriminability and sensitivity for OCRS using computer technique is studied.关键词：Difference sampling number;Discriminability;Sensitivity;Oxide Current Relaxation Spectroscopy2|22|1更新时间：2025-12-08
- 摘要：Timing performance is important to high performance VLSI. This paper pre sents a new method of timing driven placement. In initial placement we propose a new way giving weights to the nets, and in iterative placement, we present a concept called Equal Position Field. The experiment results show that this is an efficient method of timing driven placement.关键词：VLSI;layout;Timing driven placement4|31|1更新时间：2025-12-08
- 摘要：The papers[1-5] discussed the basic principle and the realizing method of a simple fuzzy controller. The paper[6]considered the contradiction between the dynamic and stable performances of the simple fuzzy controller, but it utilized the linear switch to overcome this contradiction, without full play to the fuzzy controller’s functions.After discussing the effect of the change of fuzzy sets on system performances in a simple fuzzy controller, this paper presents a new fuzzy control algorithm with variable fuzzy sets to overcome the contradiction as mentioned above, which can greatly improve the response performances of sytems from software simulations. Based on the algorithm, this paper presents further new fuzzy control algorithms with self-optimizing fuzzy sets. It is shown that these algorithms are very applicable from simulations. After self-optimizing fuzzy sets, the response performances of fuzzy control systems are very satisfactory.关键词：fuzzy control;fuzzy set;Self-optimizing;algorithm;simulation2|121|17更新时间：2025-12-08
- 摘要：Based on the frame and method of semi-infinite and nondifferentiable optimization technique, the advanced strategy and method of solving unitized model of circuit design centering for manufacturing yield maximization, tolerancing, tuning and cost minimization （DCTT） are proposed in this paper. When the method is used to solve DCTT problem, the circuit characteristics functions can be allowed to be nonconvex and nonsmooth. After the strategy of restraining constraint expansion is introducted, the method can solve larger scale statistical optimization problem. It opens up a new way for further development in the field of statistical optimization.关键词：Circuit optimization design;Statistical optimization;Yield maximization2|21|1更新时间：2025-12-08
- 摘要：This paper shows that calculation of the maximum dynamic power consumption for CMOS circuits may be achieved through calculating the minimum number of non-convertion gate in the circuit with a special test sequence as input. The algorithm about polarity assignment and value assignment advanced in this paper could be used not only to solve fast the minimum number of non-convertion gate but also to generate the corresponding test sequence. This algorithm is independent of the number of input variable in the circuit.关键词：CMOS circuits;Dynamic power consumption calculation;Test generation algorithm;Combinational logic circuits3|143|0更新时间：2025-12-08
- 摘要：A program for Switched-Capacitor Filter （SCF） design is described in this paper. The epuivalent circuits are produced automatically by using Modified-KNOB Method raised by the authors. The frequency response of SCF is calculated by means of the general circuit simulation program-SPICE, meanwhile, the effect of the Operational Amplifier’s finite gain bandwidth is considered. The method is simple and facile. The measured results of several real circuits are identical to those of computer simulation.关键词：Switched-Capacitor Filter;KNOB method;Automatic producing equivalant circuit2|16|0更新时间：2025-12-08
- 摘要：By discussing efficiency and redundancy of signal-encoding in the 2-3 mixed-valued circuits, the drawbacks of conventional 1T-2B encoding is analysed, the 3B-2T encoding is proposed, and CMOS interface circuits for 3B-2T encoding are designed. The discussion shows that the circuits using 3B-2T encoding scheme have advantages of high efficiency, easy designing and reducing one third of external signal lines with the same internal binary interconnection.关键词：Multiple-value logic;interface circuit;Encoding technique2|46|1更新时间：2025-12-08
- 摘要：In this paper, the forming process of copper wire ball in copper ball bonding has been studied by numerical simulation. By means of calculation of temperature field, speed field and displacement field for ultrafine copper wire under a mini-arc, the formation rule of copper wire ball has been clarified. The calculating results of displacement field have also been tested and verified.关键词：Forming process of copper wire ball;Temperature field;Speed field;Displacement field2|54|0更新时间：2025-12-08
- 摘要：Recently, phase shifting lithography, as a novel lithography process, has been developped (or ULSI applications. It utilizes optical phase shifting mask to improve resolution limit for an existing wafer stepper. This paper describes the development of phase shifting lithography and its applications in ULSI technology.关键词：Optical lithography;phase shift;Phase shifting mask2|44|2更新时间：2025-12-08
- 摘要：<正> 由国际神经网络学会、跨国电气电子工程师学会神经网络联合会、中国神经网络联合会共同组织的1992年北京国际联合神经网络学术大会（IJCNN′92—Beijing）于1992年11月1—5日在北京国际会议中心举行并获得成功。出席会议的400名代表来自21个国家和地区,其中海外代表154人,日本代表达59人,代表中30岁左右的青年人占一半以上,反映青年人在新兴学科中正在起着生力军的作用。2|16|1更新时间：2025-12-08
- 摘要：Aiming at the recognition problem for Regular Script Chinese Character （RSCC）, we have advanced a new method for abstracting the features of the RSCC from the view of entire evolution and have constructed a computer recognition system. Becausce we emphasized the entire information, relative relationship between components in our method, we have obtained & good effect and the rate of correct recognition for RSCC comed to 80%.关键词：Feature abstracting;Computation in entirety;Handwriting recognition2|109|2更新时间：2025-12-08
- 摘要：The history, present situation and importance of the laser-generated ultrasonic technique are presented. Basic principles and some experimental results of laser-generated ultrasonic gauge which we developed are introduced. Several problems about using this technique to NDT are discussed in the paper.关键词：Lasef-generated ultrasound;Fabry-Perot interferometer;non-destructive testing2|200|1更新时间：2025-12-08
- 摘要：The gas sensors based on copper phthalocyanine thin films are reported in the paper. The copper phthalocyanine thin films are deposited on the plane interdigital electrode by using vacuum gas phase physical deposition technique. The results show that the sensors exhibit high sensitivity and high selectivity to NO2 gas, and can be used to detect 1 ppm of NO2 in air. Response time of less than 1 minute and recovery time of the order of several minutes are observed. Annealed at 320℃, the stablity and the repeatability of the sensors are improved.关键词：sensor;Copper phthalocyanine;NO2 response2|143|2更新时间：2025-12-08
- 摘要：To understand better the properties of the interface layer of a-SiN:H and a-Si:H, we proposed a new measurement technique to probe the electron accumulation process caused by a step applied voltage. The samples with the structure of Cr/ a-SiN:H （3500A） /a-Si:H （2. 1μm）/n+ a-Si:H （500A）/A1 were used. The experimental results show that the a-SiN:H and a-Si:H contact forms an electron accumulation layer with electron density of about 3.2×1011cm-2. The density of accumulated electrons increases linearly with applied voltage, which agrees very well with theoretical calculation both in the shape of induced charge versus applied voltage curve and the magnitude of induced charge.关键词：a-SiN: H/a-Si:H;Interface layer;Electron accumulation2|35|0更新时间：2025-12-08
- 摘要：Based on the continuity equation and the particle flux equation, this paper deriveds the methematical model of photocurrent in bipolar devioes under square-pulsed γ radiation. In addition, this paper describes the photocurrent effect and the conductivity modulation effect on diffused resistors as well as the model in which the diffused resistor varies with γ radiation rate. Finally, a comparison is given which shows good agreement between the simulation of integrated voltage regulator and the practical radiation experiments, and suggestions for bipolar IC’s γ radiation-hardening are presented.关键词：计算机模拟.核辐射;电导调制效应;光电流效应2|27|0更新时间：2025-12-08
- 摘要：In this paper, The epitaxial growth of GaAs crystal doped with Er by LPE has been studied. The quality of the epi-layers and the properties of photoluminescence （PL） are discussed.关键词：Liquid-phase epitaxial;Rare earth doped;Photoluminescence （PL）2|22|0更新时间：2025-12-08
- 摘要：<正> 电子工业出版社出版的《数字通信》是一本非常有价值的书。它系统地阐述了数字通信的基本理论,涉及信源编码、数字调制与解调、编码与译码等基本理论和数字处理方法。还以较大篇幅阐述了近年来数字通信技术发展的新成果,特别是在均衡技术和多径衰落信道传输方面进行了深入的分析。 自从四十四年前仙农关于信息论的工作发表以来,随着微电子技术的迅速发展,数字通信领域有了惊人的进展。数字化已成为全球通信不可阻挡的历史潮流。无论是在干线通信或区域通信,无论是有线通信、微2|38|0更新时间：2025-12-08
- 摘要：<正> 中国电子学会发起并主办的国际固态技术和集成电路技术会议于1992年10月19—22日在北京举行. 这是继1986年、1989年在北京举行的第一届,第二届之后的第三届会议。参加本届会议的代表共有210余人,其中来自奥地利、比利时、英国、香港、德国、匈牙利、印度、日本、韩国、荷兰、瑞典、美国、台湾等13个国家和地区海外代表约90人,国内代表120余人。2|9|0更新时间：2025-12-08
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