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signal
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  信号
    The Submicron GaAs PHEMT Device and its Small Signal Modeling
    亚微米GaAs PHEMT器件及其小信号建模
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    I.Expressions for signal and background induced noise with space filters,IEEE Trans
    空间滤波的信号和背景噪声(红外系统之一)
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    Infrared tracker error signal generation and processing system
    红外跟踪器误差信号产生及处理系统
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    The Freguency Spectrum Purity Analysis for an Output Signal of a Digital Frequency Synthesizer
    数字式频率合成器输出信号频谱纯度的分析
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    SYNCHRONOUS INTEGRATOR——A METHOD OF EXTRACTING WEAK SIGNAL FROM NOISE
    同步积分器——噪声中提取微弱信号的一种方法
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  信号处理
    Study on the Application of Fiber Bragg Grating in Microwave Signal Processing
    光纤光栅在微波信号处理中的应用研究
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    SPEECH SIGNAL PROCESSING SYSTEM CONSISTS OF DJS 131 COMPNTER
    DJS—131电子计算机构成的语言信号处理系统
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    Application of the Sample-Hold Circuit in Signal rrocessing Units of CCLID
    采样保持电路在CCLID信号处理中的应用
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    Processing of Low Frequency Doppler Beat Freguency Signal
    低频多普勒拍频信号处理
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    SAW Convolvers and Their Applications in Signal Processing
    SAW卷积器及其在信号处理中的应用
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  “signal”译为未确定词的双语例句
    Small Signal Stability Analysis for Power System Including Thyristors
    含晶闸管元件的电力系统小干扰稳定性分析
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    Effects of Dark Current on Low Signal Level Performance of EBS Camera Tube
    暗电流对EBS摄象管弱信号性能的影响
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    A Guided-Wave Wide-Band Acoustooptic Bragg Deflector and its Applications for Optical Communications and RF Signal Processing
    制导波宽带声光Bragg偏转器及其在光通讯和RF信息处理中的应用
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    Djelectric-Resonator Oscillators--A New Microwave Signal Source
    介质谐振器稳频振荡器——一种新型微波信号源
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    Architecture design of i2920 monolithic digital signal proceesor and its application
    i2920单片数字信号处理机体系结构及其应用设计
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  signal
In the early 1960s research into radar signal synthesis produced important formulas describing the action of the two-dimensional Fourier transform on auto- and crossambiguity surfaces.
      
It is shown that the one-dimensional sampling sets correspond to Bessel sequences of complex exponentials that are not Riesz bases for $L^2[-R,R].$ A signal processing application in which such sampling sets arise naturally is described in detail.
      
Given a bandlimited signal, we consider the sampling of the signal and some of its derivatives in a periodic manner.
      
We present a method for finding the dual frame and, thereby, a method for reconstructing the signal from its samples.
      
We show that if no sampling of the signal itself is involved, the sampling is not stable and cannot be stabilized by oversampling.
      
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This paper describes a detailed analysis of conversion properties of junction transistors. A new parameter "the effective conversion transconductance" is introduced for characterizing transistor converters. The effective conversion transcon-ductance of transistor converters using a PNP transistor operated at different oscillatory conditions and at various signal frequencies are studied. Main differences between transistor converters and vacuum tube converters are compared.

本文讨论面结型晶体管变频性能的分析。提出新参数“有效变频跨导”来决定晶体管变频器的特性。研究晶体管变频器在各种振荡状况下及不同讯号频率时对有效变频跨导的影响。比较晶体管变频器与电子管变频器的主要区别。

Summary This paper discusses the circuit synthesis and development technique of a transistor pulse synchronized frequency division system.It consists of many ele- mentary pulse networks such as:Transistor forming and shaping circuit,trrnsistor blocking oscillator,multivibrator,time delay circuit and “and” gate,etc.The master signal of this system is supplied from a 100—KC/S crystal controlled oscillator.With the use of many stages of both-side synchronized frequency di- viders,the system simultaneously...

Summary This paper discusses the circuit synthesis and development technique of a transistor pulse synchronized frequency division system.It consists of many ele- mentary pulse networks such as:Transistor forming and shaping circuit,trrnsistor blocking oscillator,multivibrator,time delay circuit and “and” gate,etc.The master signal of this system is supplied from a 100—KC/S crystal controlled oscillator.With the use of many stages of both-side synchronized frequency di- viders,the system simultaneously delivers stable sharp pulses of 100—KC/S, 10—KC/S,1—KC/S and 100—C/S repetition frequency.The duration of each pulse of the lowest repetition frequency is about 0.4μs,and shorter for the high repetition frequencies.The amplitudes of the pulaes of the different repetition frequencies are more than 3 volts.The resulting phase shift and drift instability of the cascade synchronized frequency dividers are eliminated by pulse selection method in this system,Hence the output pulses are accurately positioned in time relative to each other.Test results coincide fairly well with theoretical analysis.

在精密的时间测量系统中,为了获得严格的定时同步脉冲,必须消除多级分频器所产生的误差,因而需用比较复杂的分频系统。本文专门讨论了利用脉冲选择的晶体管化同步分频系统的线路综合原理和研制技术问题,对组成系统的各种单元脉冲电路,如晶体管窄脉冲形成器,晶体管间歇振荡器,晶体管多谐振荡器,晶体管延迟电路以及晶体管门电路等均作了较深入的分析,并给出相应的实验结果。系统的主振信号是由一100千赫晶体稳频的振荡器产生,通过多级脉冲选择的双侧同步分频电路,可以同时获得稳定的100千赫,10千赫,1千赫及100赫等重复频率同步窄脉冲,同步脉冲的宽度为0.4微秒,幅度大于3伏。实验结果与理论分析基本上是一致的。

Summary This paper analyzes the working principle and stability of a transistor mul- tivibrator operating as a frequency divider,with both sides being synchronized by the input signal.It is found that the frequency division stability of this circuit can further be increased when the multivibrator operates in the second class of oscillating condition,and that the optimum operating point is best determined from the actual base voltage changing characteristic.Some additional mothods of synchronization are...

Summary This paper analyzes the working principle and stability of a transistor mul- tivibrator operating as a frequency divider,with both sides being synchronized by the input signal.It is found that the frequency division stability of this circuit can further be increased when the multivibrator operates in the second class of oscillating condition,and that the optimum operating point is best determined from the actual base voltage changing characteristic.Some additional mothods of synchronization are studied.Finally,the methods of circuit design are given. Experimental results coincide fairly well with theoretical analysis.

本文分析了晶体管自激多谐振荡器用作双侧同步分频电路的一般理论和分频稳定性,并考虑基极电压变化规律来确定最佳分频的工作状态和运用点,同时对同步脉冲的引入问题亦作了原理性补充,还提出了振荡于第二类状态下的自激多谐振荡器可获得高稳定性的分频,以及此类双侧同步分频电路的设计方法。实验结果与理论计算基本上是一致的。

 
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