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噪声     
相关语句
  noise
    Study on Modularized Analysis and Design for Low-Noise Amplifier Using the Equivalent Noise Model Method
    低噪声放大器模块化分析与设计的等效噪声模型法的研究
短句来源
    Experimental Studies, Analysis and Design for Erbium Doped Fiber Amplifiers with Low Noise Figure, High and Flat Gain
    低噪声、高增益、高平坦度掺铒光纤放大器的分析与实验研究
短句来源
    CMOS Rf Devices Modeling and Low Noise Amplifiers Design
    CMOS射频器件建模及低噪声放大器的设计研究
短句来源
    The Research about the Noise for the Reliability of High Power Semiconductor Laser and Bipolar Transistor
    噪声用于半导体大功率激光器及双极晶体管可靠性研究
短句来源
    Research on the Noise Performance Mearsurement for Microwave BJT&FET Devices
    微波BJT/FET器件噪声特性测量的研究
短句来源
更多       
  noises
    Noises of Optical Fiber Gyro and Their Experimental Analyses
    光纤陀螺的噪声及其实验分析
短句来源
    COMPUTER AIDED ANALYSIS AND DESIGN FOR ELECTRONIC NOISES
    电子线路噪声的计算机辅助分析与设计
短句来源
    Effect of Coupling Between Noises on One Dimensional Laser Field
    噪声之间的耦合对一维激光场的影响
短句来源
    Steady State Analysis of a Single Mode Laser Driven by Negative Correlated Noises
    负关联噪声驱动下单模激光的定态分析
短句来源
    Stochastic Dynamics for Multi Dimensional Systems Driven by Correlated Noises
    关联噪声驱动多维系统的随机动力学
短句来源
更多       
  a noise
    Simulation and analysis using ADS simulator show that the circuit has a gain of 11.34 dB,a noise figure of 2.2 dB,an input reflection of-33 dB,and an IIP3 of-4 dBm with 12 mW of power consumption.
    该电路采用TSMC 0.35μm CMOS工艺,用ADS模拟软件进行分析与优化。 结果表明,设计的低噪声放大器,其增益为11.34 dB,噪声系数为2.2 dB,功耗12 mW,输入反射系数-33dB,线性度-4 dBm。
短句来源
    This low noise amplifier provides a forward gain of 26.3 dB with a noise figure of only 1.9 dB while drawing about 5.8 mA current from 2.5 V supply voltage. The stack-style structure,which reuses the bias current,guarantees low power dissipation(about 14.5 mW) and high reverse isolation of about-40 dB.This LNA achieves IIP3 of-15 dBm and 1-dB compression of-25 dBm.
    测试结果表明,在2.5 V供电时,放大器可以提供约26.3 dB的前向增益,噪声系数约为1.9 dB,放大电路从电源电压上抽取5.8 mA左右的工作电流,反向隔离度达到-40 dB,放大器的IIP3约为-15 dBm。
短句来源
    The amplifier provides a gain of 16 dB and a noise figure below(0.4) dB in the frequency range of 880~915 MHz. Test results show that the circuit has met the specifications for practical applications.
    放大器在880-915 MHz频率范围内增益为16 dB左右,噪声系数小于0.4 dB.测试结果达到了实用的指标要求.
短句来源
    A Noise Cancellation System Based on Fuzzy Adaptive Filter
    基于模糊自适应滤波器的噪声对消系统
短句来源
    A Noise Model for Σ-Δ Modulators in SIMULINK
    Σ-Δ调制器在SIMULINK下的噪声模型
短句来源
更多       
  amplitude noise
    Measurements show that the polarization rate is more than 1000∶1, stability in 4 hours is better than 0.5%, and amplitude noise is less than 0.1%. 
    测量结果表明,偏振比超过了1000∶1,功率稳定性优于0 5%,振幅噪声小于0 1%。
短句来源
    Variations of the longitudinal modes and the amplitude noise power spectrum with the incident pump power have been studied.
    研究了激光器的纵模特性及弛豫噪声与泵浦功率的关系;
短句来源

 

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  noise
Wavelets, generalized white noise and fractional integration: The synthesis of fractional Brownian motion
      
However, unlike the values of f(n)(t0), the values of the chromatic derivatives Kn[f](t0) can be obtained in a noise robust way from sufficiently dense samples of f(t).
      
This receiver simultaneously combats multipleaccess interference (MAI) and non-Gaussian impulsive noise.
      
This paper studies the characteristics of this type of image with complex shape target or noise and presents an improved Snake algorithm.
      
The simulation results indicate that the new Snake model greatly decreases the dependence on the Snake point's initial position and effectively overcomes noise influence.
      
更多          
  noises
Higher-order stochastic partial differential equations with branching noises
      
In this paper, we propose a class of higher-order stochastic partial differential equations (SPDEs) with branching noises.
      
However, the maximum cylinder pressure, maximum pressure rise rate and combustion noises of the DME engine are lower than those of diesel.
      
A quadratic control for discrete stochastic systems with random parameters and additive and multiplicative noises dependent on state and controls is studied.
      
Accuracy of Construction of Approximating Models under Bounded Measurement Noises
      
更多          
  a noise
However, unlike the values of f(n)(t0), the values of the chromatic derivatives Kn[f](t0) can be obtained in a noise robust way from sufficiently dense samples of f(t).
      
In air pressure, a kind of vibration-wheel micromachined gyroscope has achieved a noise level of 0.0073 deg s-1·Hz-1/2 over the 100-Hz bandwidth by using this digital readout technology.
      
The interhemispheric relations found during the perception of emotions are unstable and, when speech is masked by a noise, acquire the direction that is characteristic of normal children.
      
At a noise of 52 dB, which is close to the threshold of full masking, the reaction time is not increased significantly compared to its estimation at a noise of 46 dB.
      
The minimum detectable flux densities for fast and thermal neutrons are estimated at 5 × 1010 and 108 cm-2 s-1, respectively, at a noise current of 10-3 A for the electronic equipment.
      
更多          
  amplitude noise
The synthesizer can operate in the frequency band of 0-10 MHz with a frequency step of >amp;lt;0.005 Hz, the phase noise level is less than -140 dB/Hz, and the amplitude noise level is less than -60 dB/V.
      
For weak coupling between the cavities, the amplitude noise at the outlet of the empty cavity decreases sharply, and the emission band becomes narrower than the natural bandwidth.
      
The effect of the amplitude noise of the pulses is assessed, as well as the impact of an inaccurate knowledge of the NOLM transfer function, or of the energy transfer characteristic.
      
Measurements of the laser linewidth due to quantum phase and quantum amplitude noise above and below threshold.
      
The natural linewidths and line shapes due to quantum phase and quantum amplitude noise have been investigated above, within and below the threshold region of laser operation using a Fourier spectroscopic technique.
      
更多          
  其他


The effective noise figure of a nondegenerative parametric amplifier, loaded with a noisy second stage, is derived and expressed in terms of the coupling factor and the normalized negative conductance. The optimization of the effective noise figure of the system is then discussed in detail. The gain of the amplifier is also given in terms of the coupling factor and the normalized negative conductance, the relationship between the gain and the effective noise figure is thus found. An upper limit of the bandwidth...

The effective noise figure of a nondegenerative parametric amplifier, loaded with a noisy second stage, is derived and expressed in terms of the coupling factor and the normalized negative conductance. The optimization of the effective noise figure of the system is then discussed in detail. The gain of the amplifier is also given in terms of the coupling factor and the normalized negative conductance, the relationship between the gain and the effective noise figure is thus found. An upper limit of the bandwidth of the amplifier is established in view of the optimum noise performance. Finally, a method of synthesis is suggested with numerical illustrations.

本文首先推导了级联着一个噪声很高的次级的参量放大器系统的有效噪声系数,并且用耦合系数和规一化负电导来表示;然后详细地讨论了这个有效噪声系数的最佳化问题。因为放大器的增益也可用耦合系数和规一化负电导来表示,因此在增益和有效噪声间获得一个单值关系式。从最佳噪声运用角度出发建立了放大器通带的上限值。最后,提出一个新的综合方法,并用数字例子作说明。

This paper describes a new type of gas discharge tube which can be inserted horizontally into a circular waveguide as a standard noise source. It gives good matching (VS,WR = 1.10±0.05) to the waveguide system with a short circuit at one end and a .stable noise out put of 18±0.5 db in the 3 cm wavelength. This result has useful applications to the development of noise tubes in the wavelength region below 8 mm and above 10 cm.

本文描述一种新型的放电管,可以水平地插入圆波导作为标准噪声源。在3厘米波段工作时,当终端短路的情况下对波导系统的匹配是良好的(V.S.W.R=1.10±0.05),并且具有18±0.5db的稳定噪声输出。这结果可以应用在发展8毫米以下及10厘米以上的波导型噪声管的研究工作上。

After a research on the design and performances of different gaseous disc-

本文以E—10°、E—7.5°、E—10°斜插和H—90°四种耦合方式7.14~10厘米波段的8瓦及6瓦2.5~3.5毫米Hg低压氩气荧光灯放电管噪声发生器进行研究,从所获得各种性能分析比较,认为在测量具有20分贝以下噪声系数的厘米波段设备方面,E—10°插入式是个最适合的次标准噪声源。

 
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