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1987 Vol. 9, No. 2
Display Method:
1987, 9(2): 97-106.
Abstract:
A new scheme of target discrimination based on transient EM-fields is described in detail-in this paper. The fundamental theory and its mathematical deduction for getting scattering fields of single frequency of a excited target are given.We have got...
A new scheme of target discrimination based on transient EM-fields is described in detail-in this paper. The fundamental theory and its mathematical deduction for getting scattering fields of single frequency of a excited target are given.We have got...
1987, 9(2): 107-115.
Abstract:
The relation between the sample number and the performances of signal detection and paramater estimation in correlative Gaussian noise in fixed time T is investigated. It is pointed out that when the autocorrelation coefficient between the neighbour ...
The relation between the sample number and the performances of signal detection and paramater estimation in correlative Gaussian noise in fixed time T is investigated. It is pointed out that when the autocorrelation coefficient between the neighbour ...
1987, 9(2): 116-124.
Abstract:
The design method of E/D NMOS chopper-stabilized operatinal amplifier is discussed. The offset factors are analyzed and a new formula is derived. The circuit design is simulated with SPICE-II and the experiment of test chip shows a satisfactory resul...
The design method of E/D NMOS chopper-stabilized operatinal amplifier is discussed. The offset factors are analyzed and a new formula is derived. The circuit design is simulated with SPICE-II and the experiment of test chip shows a satisfactory resul...
1987, 9(2): 125-134.
Abstract:
The elementary unit of switched-capacitor (SC) network is composed of lossless integrator. According to charge conservation law, the lossless integrator can be equivalently transformed to two independent networks in z-domain. Introducing a storistor ...
The elementary unit of switched-capacitor (SC) network is composed of lossless integrator. According to charge conservation law, the lossless integrator can be equivalently transformed to two independent networks in z-domain. Introducing a storistor ...
1987, 9(2): 135-139.
Abstract:
The method of determination of plasma temperature by measuring the deionization time of discharge is proposed. The testing set-up and the experimental results are given. It shows that the obtained results are in good agreement with that obtained by p...
The method of determination of plasma temperature by measuring the deionization time of discharge is proposed. The testing set-up and the experimental results are given. It shows that the obtained results are in good agreement with that obtained by p...
1987, 9(2): 140-148.
Abstract:
The general field solutions are obtained for two kinds of infinitely long multipole electrostatic deflectors. A method is Riven to obtain uniform deflection field near optical axis. Having calculated six forms of the deflectors, the concerned formula...
The general field solutions are obtained for two kinds of infinitely long multipole electrostatic deflectors. A method is Riven to obtain uniform deflection field near optical axis. Having calculated six forms of the deflectors, the concerned formula...
1987, 9(2): 149-155.
Abstract:
Some results in investigating deep levels in Ti-doped silicon are given. Three Ti associated deep levels are found by DLTS. They are two electron trap levels located at Ec- 0.23 eV and Ec - 0.53eV respectively in Ti-doped n-silicon and a hole trap le...
Some results in investigating deep levels in Ti-doped silicon are given. Three Ti associated deep levels are found by DLTS. They are two electron trap levels located at Ec- 0.23 eV and Ec - 0.53eV respectively in Ti-doped n-silicon and a hole trap le...
1987, 9(2): 156-160.
Abstract:
The diffusion of Zn, Zn-Cd in InxGa1-xAs is investigated using ZnAs2 and ZnAsa+Cd as the diffusion source. The effect of the diffusion temperature, diffusion time, variety of the diffusion source and composition of the material on the relation of the...
The diffusion of Zn, Zn-Cd in InxGa1-xAs is investigated using ZnAs2 and ZnAsa+Cd as the diffusion source. The effect of the diffusion temperature, diffusion time, variety of the diffusion source and composition of the material on the relation of the...
1987, 9(2): 161-164.
Abstract:
A Stable surface layer is essential for a high stable long life-span photocathode. Using fluorine instead of oxygen in activating the surface of GaAs substrate, the strong electronegativity of fluorine improved the stability of photocathode. The life...
A Stable surface layer is essential for a high stable long life-span photocathode. Using fluorine instead of oxygen in activating the surface of GaAs substrate, the strong electronegativity of fluorine improved the stability of photocathode. The life...
1987, 9(2): 172-175.
Abstract:
The problem of two △-function inverse are further discussed. Methods of solving decon-volution difficulties when the Kernel spectrum contains zeroes are presented.
The problem of two △-function inverse are further discussed. Methods of solving decon-volution difficulties when the Kernel spectrum contains zeroes are presented.
1987, 9(2): 176-180.
Abstract:
In this paper a piecewisely linear (with three or four segments) dynamic version for the relaxation oscillations in a circuit with Bidirectional Negative Resistance Transistor (BNRT) is studied. The circuit and the dynamic equations are given and som...
In this paper a piecewisely linear (with three or four segments) dynamic version for the relaxation oscillations in a circuit with Bidirectional Negative Resistance Transistor (BNRT) is studied. The circuit and the dynamic equations are given and som...
1987, 9(2): 181-187.
Abstract:
A practical method for directly designing sequential circuits by use of state transition diagrams is described. This method has many advantages. It is easy to use and especially suitable for multi-input and multi-state conditions.
A practical method for directly designing sequential circuits by use of state transition diagrams is described. This method has many advantages. It is easy to use and especially suitable for multi-input and multi-state conditions.
1987, 9(2): 188-192.
Abstract:
The theory of corrugated conical horn operating at multi-frequency bands is described,. and a practical corrugated conical horn is constructed. It can operate at three frequency bands (4, 6, 11 GHz) at least. The cross poralization peak level is bett...
The theory of corrugated conical horn operating at multi-frequency bands is described,. and a practical corrugated conical horn is constructed. It can operate at three frequency bands (4, 6, 11 GHz) at least. The cross poralization peak level is bett...
1987, 9(2): 165-171.
Abstract:
In 1887, Hertz Discovered the photoemission effect. In memory of the centenary of the discovery of photoemission effect, a condensed review of the development and the existing situation of practical photocathodes are presented in this paper.
In 1887, Hertz Discovered the photoemission effect. In memory of the centenary of the discovery of photoemission effect, a condensed review of the development and the existing situation of practical photocathodes are presented in this paper.
