range noise

Through the low-noise amplifier designed, the spectrum and time figure of the transistor noise at low frequency ( 100mHz~ 1.65Hz) was measured, besides that, the scale invariant range and fractal dimension are calculated with several methods.

利用设计的低噪声放大器，测量出晶体管低频段（100mHz&1.65Hz）噪声的功率谱及时间波形，找出了其无标度区间，并用多种方法计算了分形维。

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In this range finder, an automatic noise threshold control circuit is used to automatically control average noise pulse firing rate. Such that a constant average noise pulse firing rate is obtained.

测距仪采用自动噪声电平控制电路动态控制噪声脉冲的平均发生率，使系统获得稳定的平均噪声脉冲发生率；

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The long-range electric torpedo homes in on the noise of the target ship's propellers.

远程电动水雷顺着目标船的螺旋浆的声音进行追踪。

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High background noise and large dynamic range are the most outstanding characteristics of the infrared CCD ( IRCCD) output. Getting rid of high DC background and automatic gain control are very essential for extracting target signal out effectively.

由于红外CCD的输出为高背景、宽动态范围的信号，所以在该信号的处理电路中，去除直流高背景和自动增益对于滤除背景噪声、提取目标信号必不可少。

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With the development of acoustic stealth technology, the noise and target strength of underwater target significantly reduced, and the sonar operating range is decreasing accordingly.

现阶段由于声隐身技术的发展，水下目标的辐射噪声和目标强度都大幅降低，声纳的作用距离也随之下降。

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In various high performance, wide dynamic range frequency convertings, phase noise is a main limiting factor.

在各种高性能、宽动态范围的频率变换中，相位噪声是一个主要的限制因素。

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In a certain range of maintaining time, extension of maintaining time can effectively reduce blanking noise.

在一定保压时间范围内，延长保压时间可以有效降低冲裁噪声。

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The II/ TV DQE drops at higher dose range due to fixed pattern noise and CCD shot noise.

而影像增强器电视系统的DQE在较大范围内下降是由于混合性的图像噪音及CCD的SHOT噪音。

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Detection technology of boiler tube leakage is based on the principle: the sensor picks up the noise with a certain intensity and frequency range, produced during boiler tube leakage, and distinguishes leakage noise source from background noise source.

锅炉炉管泄漏检测技术是通过传感器捕捉炉管泄漏时产生一定强度和频率范围的噪音，并区分泄漏声源和背景声源。

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To solve the contradiction of gain and tuning range of VCO, the self-adjusted-discrete VCO is introduced, by which the gain and phase noise of VCO can be largely decreased in wide tuning range.

针对VCO的增益与调节范围的矛盾，本文设计了离散型-自调节压控振荡器，达到了较大的频率调节范围，较小的振荡器增益以及较低的环路相位噪声。

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