最新刊期
卷 ， 期 1 ， 1980
- 摘要：A new LSI circuit, DYL 12 bits high speed look ahead carry generator, which is one of the series of DYL, is described.It consists of basic linear And-Or gates and is characterized by high speedand simple processing with high yield and low processing tolerance requirement. Many advantages are clearly shown as comparing its characteristics with other series products. After testing the whole function ofthe sample by random function testing equipment and operating it in CPU of DYL-1300 processor, it is Confirmed that the sample has stable performance with high speed and high reliability.2|40|6更新时间：2025-12-08
- 摘要：The input resistance of a commonly-used amplifier is so large that the distributed capacitance is very harmful. An approach to minimize the influence of distributed capacitance is proposed and the concept of quasi-null-resistance amplifiers is introduced.The quasi-null-resistance amplifier and the commonly-used high resistance voltage amplifier are mated, their characteristics, applications, circuit configurations, advantages and defects correspond to each other. The new circuit can perform amplification of various signals. It has the advantages of minimizing the influence of the distributed capacitance and improving the frequency characteristics. When the amplifier is applied to the transmission of the measurement signals over a long distance, the attenuation and distortion caused by distributed parameters of leads can be eliminated. When it acts as a wide-band amplifier, the influence of the input and output capacitance of an a mplifier is decreased, therefore the bandwidth can be greatly increased. When the amplifier is used.in the input circuit, the input capacitance can be reduced from tens of pF to 1pF.2|24|2更新时间：2025-12-08
- 摘要：It is rediscovered that some early works on conventional waveguides, including several published papers by the author, are applicable to optical fiber and film waveguides. This paper shows that the coupling coefficients for ideal modes, for local modes and for superlocal modes are all related by similar matrices in the sense of Lowey, and as far as discrete modes are concerned, the "equivalence"expressions derived by Marcuse are special cases of our general results. Physical arguments will illustrate the reasonable-ness, under certain restrictions, of extending the applicability of the said relations to cases which also in-elude a continuum of modes.4|57|0更新时间：2025-12-08
- 摘要：This paper is to show how a modified Wang product can be used to generate all the Hamil-tonian cycles in a plane graph with considerably less computation than previousely reported. The method is explained in detail with examples. To assure correct algorithm a necessary and sufficient condition for a 2-tree to be a vertex 2-tree is derived. A vertex graph is said to be a vertex 2-tree, if it has 2-com-ponents and contains no cycles.4|53|8更新时间：2025-12-08
- 摘要：A direction-controlled weighting factor of crossed-loop element radiation pattern is derived,which shows that under weighting condition the principle of pattern multiplication can be applied to phased circular arrays of arbitrarily-oriented crossed-loop elements. Up till now, the techniques for optimization are considered appropriate for an array of similarly-oriented identical directive elements. Such techniques are expressed by the ratio of two Hermitian forms. The paper holds that such techniques can be applied to phased circular arrays of arbitrarily-oriented crossed-loop elements.The paper proposes a formula of far-zone radiation field for phased circular arrays of arbitrarily-oriented crossed-loop elements, derives an expression of far-zone field for phased circular arrays of crossed-loop elements under the weighting condition, and the optimization formula by adjusting either complex excitation or phase.3|21|0更新时间：2025-12-08
- 摘要：The paper discusses the processes of fabricating high sensitivity thick tri-alkali antimonide photocathode on inside surface of fibre-optic window in an image intensifier. Following data have been obtained for 15 samples: mean integral sensitivity 3251μA/lm, minimum sensitivity 270μA/lm,maximum sensitivity 440μA/lm. When λ is 0.9μm, IR response is usually at approximate 6mA/W, the highest being 10.8 mA/W.Peak of photo sensitivity distribution occurs at 0.55 to 0.65μm, wavelength threshold can be extended to above 0.95μm.2|52|10更新时间：2025-12-08
- 摘要：In this paper is presented an architecture of duplexmicroprocessor system for increasing the operating speed of computerized sequential machines, exploiting two ideas which sequential machines inherit. That is to say, （ 1 ） sequential machines of Mealy type possess proper characteristics of parallelism im their computation of next internal state and output state; （ 2 ） any sequential machine can be converted into a corresponding amount of autonomous sequential machines. Analysis shows that in comparison with the operating speed of single microcomputer scheme, the operating speed of the duplex-microprocessor system can be increased in a factor of 2.4.Based on the M6800 microcomputer family, a duplex-microprocessor sequential machine is designed to illustrate how to implement the two ideas.2|11|0更新时间：2025-12-08
- 摘要：The mechanism of slow degradation of GaAs-AIxGa1-xAs DH lasers has been analysed on the basis of a defect model proposed by the author in a previous paper. From the analogy between the slow degjadation of GaAs DH lasers and that of the LED’s GaAs, GaAs-AlxGa1-x As and Gap,it ia suggested that GaAs DH lasers and GaAs1-xPx LED’s should degradate by a similar mechanism too.This leads to the conclusion that the traps GaAVGa and As aV a predicated by our model might play an , important role in the slow degradation of GaAs DH lasers. Finally, the effect of some technological factors is discussed in the light of the proposed mechanism of degradation.2|29|0更新时间：2025-12-08
- 摘要：Based on the dyadic additive group and the properties of discrete Walsh function, a simple and effective method for processing a discrete signal in time domain is presented. This process may be applied in data compression or Walsh comb filtering. A preliminary description is put forward on the relationship between the dyadic additive group and discrete Walsh function.5|25|10更新时间：2025-12-08
- 摘要：The paper gives a brief account on physical significance and characteristics of widely used noise measure M . Graphic formulas of noise measure M on Smith chart have been derived from scattering parameters （S）,noise parameters and source reflection coefficients of linear two-port network,thus providing convenience for designing low noise front-end amplifiers at minimum noise measure .Mmin.2|20|0更新时间：2025-12-08
- 摘要：A fabrication process of sub-micro silicon film used for 4mm IMPATT diode was described and some experimental results were given.2|57|0更新时间：2025-12-08
- 摘要：The entire operating process of RC-Wien-bridge oscillator is analysed by means of oscillatory equation.2|156|8更新时间：2025-12-08
- 摘要：This paper gives the idea of designing the parametric amplifier from electro-magnetic field structure. First the general principles used in the past are reviewed, then the details of the possible fieldstructure on the idle frequency is analysed. Last the design of the idle circuit is presented.2|19|0更新时间：2025-12-08
- 摘要：On the basis of computer calculations for a series of image tubes, we proposed an approximation for structure characteristic parameter K characterizing the internal connection between magnification M,object distance P and image distance Q of an electron-optical system. It is easy to estimate these electron-optical properties of image tubes and to draw up the initial design by means of the approximation.2|10|0更新时间：2025-12-08
- 摘要：<正> 正在受到激光界关注的快放电泵浦型惰性气体单卤化物准分子激光器,是在R.Burnham等于1976年证明快放电泵浦XeF激光作用的启示以后发展起来的。我们研制的这台实验性紫外激光装置是在1978年底完成的。图1示出了它的方框图。泵电路按Blumlein接线,直流高压电源经脉冲形成线产生μs量级的脉冲,向泵电路充电至14kV后,起动自触发2|18|0更新时间：2025-12-08
- 摘要：<正> 中国科学院半导体研究所采用该所创新的多元逻辑电路,于1979年9月试装成功了每秒运算50万次、字长16位的DYL-1300型微计算机。该样机采用了微程序控制方式,其指令系统的全部功能与国产小型计算机DJS-130的相同。从目前测试结果看,各条指令执行速度均超过后者。经过50小时以上连续正常运转,证明了新研制的多元逻辑成功地2|11|0更新时间：2025-12-08
- 摘要：<正> 中国陕西微电子研究所采用该所研制的大规模集成电路,于1978年研制成功了一种新型的77-1型微计算机。该机的技术指标是:基本字长16位,最多可进行64位字长的运算;基本指令23条,可进行多倍位长操作;采用微程序控制技术,共用100条微指令;主频为50kHz,微指令工作周期为2μs;主存贮器采用N沟硅栅MOS存贮器(RAM-1k2|13|0更新时间：2025-12-08
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