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1988 Vol. 10, No. 6
Display Method:
1988, 10(6): 481-490.
Abstract:
In this paper, the problem how to reduce the GB effect in SC filter is discussed. A new general biquadratic SC structure in which the GB effect is reduced is developed. The structure is strays-insensitive, has very low W0and Q sensitivities. Using th...
In this paper, the problem how to reduce the GB effect in SC filter is discussed. A new general biquadratic SC structure in which the GB effect is reduced is developed. The structure is strays-insensitive, has very low W0and Q sensitivities. Using th...
1988, 10(6): 491-500.
Abstract:
A novel design of three-phase oscillator using switched-capacitor (SC) techniques is developed. Two classes of active RC prototypes are used to realize the switched-capacitor oscillators (SCO): one is the SD oscillator while the other is the three st...
A novel design of three-phase oscillator using switched-capacitor (SC) techniques is developed. Two classes of active RC prototypes are used to realize the switched-capacitor oscillators (SCO): one is the SD oscillator while the other is the three st...
1988, 10(6): 501-506.
Abstract:
The design principle is described for low frequency integrated operational amplifier XD1531 with low noise. The design procedures of both circuit and mask pattern are considered. The circuit structure of the first stage is designed with the methods f...
The design principle is described for low frequency integrated operational amplifier XD1531 with low noise. The design procedures of both circuit and mask pattern are considered. The circuit structure of the first stage is designed with the methods f...
1988, 10(6): 507-512.
Abstract:
A new method for measuring ocean wave length and direction from Seaset synthetic aperture radar (SAR) remote sensing image is presented in the paper. In the method, a ocean wave image is sampled in certain directions, the samples are then analyzed by...
A new method for measuring ocean wave length and direction from Seaset synthetic aperture radar (SAR) remote sensing image is presented in the paper. In the method, a ocean wave image is sampled in certain directions, the samples are then analyzed by...
1988, 10(6): 513-519.
Abstract:
An approximate formula of space charge field of orotron in rectangular coordinate system, when one of the boundaries is infinite, is derived. Using this model the self-consistent large signal interaction of orotron with space charge is calculated, an...
An approximate formula of space charge field of orotron in rectangular coordinate system, when one of the boundaries is infinite, is derived. Using this model the self-consistent large signal interaction of orotron with space charge is calculated, an...
1988, 10(6): 520-527.
Abstract:
Based on the relativistic general trajectory equations solved by the tensor method in a Frenet lecal coordinate system, considering the characteristics of wide electron beam focusing possessing a cathode surface, equations of the principal trajectory...
Based on the relativistic general trajectory equations solved by the tensor method in a Frenet lecal coordinate system, considering the characteristics of wide electron beam focusing possessing a cathode surface, equations of the principal trajectory...
1988, 10(6): 528-535.
Abstract:
a-Si:H vidicon targets based on the blocking structure have been deposited and investigated. The target current-voltage characteristics in dark and under illumination are measured. The photosensitivity is 2400 uA/lm. The spectral sensitivity is high ...
a-Si:H vidicon targets based on the blocking structure have been deposited and investigated. The target current-voltage characteristics in dark and under illumination are measured. The photosensitivity is 2400 uA/lm. The spectral sensitivity is high ...
1988, 10(6): 536-540.
Abstract:
Target identification by its complex natural frequencies is considered the one of the mosi prospective methods. However, the tolerance of SNR and the real-time behaviour of the method can not be met simultaneously in the process of extracting the fre...
Target identification by its complex natural frequencies is considered the one of the mosi prospective methods. However, the tolerance of SNR and the real-time behaviour of the method can not be met simultaneously in the process of extracting the fre...
1988, 10(6): 541-544.
Abstract:
Theoretical formula for determining the power spectrum of the scintillation radio-wave signal with interferometer is presented in this paper for study of ionosphere. The results of theoretical calculation agree will the measurements. The radio scinti...
Theoretical formula for determining the power spectrum of the scintillation radio-wave signal with interferometer is presented in this paper for study of ionosphere. The results of theoretical calculation agree will the measurements. The radio scinti...
1988, 10(6): 545-550.
Abstract:
An analysis technique----quasi-TEM wave analysis for gap discontinuity insuspended stripline is proposed. On either side of the discontinuity, the gap discontinuities with the same structure are inserted at equal spacing so that periodic discontinuit...
An analysis technique----quasi-TEM wave analysis for gap discontinuity insuspended stripline is proposed. On either side of the discontinuity, the gap discontinuities with the same structure are inserted at equal spacing so that periodic discontinuit...
1988, 10(6): 551-557.
Abstract:
An optimal design of the switched-capactitor network (SCN) in the biquadratic state-space is developed in this paper. Only n/2 states are needed to describe n-state filters in the design, so that many storages can be saved. After discussing the stabi...
An optimal design of the switched-capactitor network (SCN) in the biquadratic state-space is developed in this paper. Only n/2 states are needed to describe n-state filters in the design, so that many storages can be saved. After discussing the stabi...
1988, 10(6): 558-562.
Abstract:
Based on GTO s turn-off theory, parameter design and production technology are studied. Its performance characteristic and doping profile are measured. A 500 A reverse-blocked power GTO is made by using domestic material, equipment and installatiins....
Based on GTO s turn-off theory, parameter design and production technology are studied. Its performance characteristic and doping profile are measured. A 500 A reverse-blocked power GTO is made by using domestic material, equipment and installatiins....
1988, 10(6): 563-567.
Abstract:
A new method is applied to characterize the defects in GaAs material (e.g. the absorption of EL2 centres). The method consists of transmitting a laser beam (=1.1-1.5 m) through the GaAs wafer of 4-8 mm thickness and 50 mm diameter. The image is recei...
A new method is applied to characterize the defects in GaAs material (e.g. the absorption of EL2 centres). The method consists of transmitting a laser beam (=1.1-1.5 m) through the GaAs wafer of 4-8 mm thickness and 50 mm diameter. The image is recei...
1988, 10(6): 568-571.
Abstract:
For testing the sensitivity of plumbicon used in x-ray camera a P20 type light source is required. There are two methods of getting P20 type light source: (1) The P20 type light source is composed of a mini-oscillotron, screen of which is coated with...
For testing the sensitivity of plumbicon used in x-ray camera a P20 type light source is required. There are two methods of getting P20 type light source: (1) The P20 type light source is composed of a mini-oscillotron, screen of which is coated with...
