Noise figure is minimized by a parameter amplifier.
采用参数放大器，即可将噪声系数减至最低。
The scheme of Noise Figure measurement best matched for this balanced LNA is proposed.
并且提出了平衡低噪声放大器噪声系数的测试方案。
The main performances of erbium doped fiber amplifiers are the saturated gain and noise figure.
掺饵光纤放大器的主要性能是它的饱和增益特性和噪声系数。
This article introduces the method of extending noise figure meter HP 8970a measurement frequency range.
本文介绍了扩展噪声系数表hp 8970a测量频率范围的方法。
The methods and the experimental setups for measuring the gain and noise figure of an EDFA are emphasized.
介绍了组成掺铒光纤放大器各组件的特性测量方法，重点介绍了测量掺铒光纤（EDF）参数的方法和实验装置；
As the first stage of the system, its gain, noise figure(NF) and linearity directly take effect on the whole circuit.
由于是整个电路系统的第一级，其增益、噪声、线性度等直接影响整个电路系统的性能。
The total cascaded noise figure of this receiver is as low as 1.4 dB that can help provide increased sensitivity for indoor use.
总级联该接收机的噪声系数低至1.4分贝，可以帮助提供室内使用的敏感性增加。
The measurement has shown that the devices have higher associated gain, higher gate-drain breakdown voltage and lower noise figure.
测试表明，器件具有高增益、高栅-漏击穿及低噪声特性。
We designed the LNA according to the performance index of its forward power gain, noise figure, linearity, power consumption and so on.
对低噪声放大器设计时，主要围绕正向功率增益、噪声系数、线性度、功耗等主要性能指标进行设计。
Finally, we consider solving the existence of substrate resistance and substrate resistance in the presence of the minimum noise figure.
最后还考虑了衬底电阻求解存以及在衬底电阻存在下的最小噪声系数。
We also experimentally demonstrate a novel three-stage erbium-doped fiber amplifier with high gain, low noise figure, and high output power.
研究了新型的三段级联泵浦优配的掺铒光纤放大器的优化光路结构，得到高增益，低噪声，大输出功率的掺铒光纤放大器；
Round the feature of the ultrafast speed, make the detailed description of phase noise, receiver noise figure, launch power, threshold level of system.
围绕超高速这一特点，对系统的相位噪声、接收机噪声系数、发射功率、系统门限接收电平等作详细的论证，以确定总体设计方案。
The basic requirements of the LNA include: low noise figure, enough power gain, reliable work stability, sufficient bandwidth and the wide dynamic range.
对低噪声放大器的基本要求是：噪声系数低、足够的功率增益、工作稳定性可靠、足够的带宽和大的动态范围等。
Many emphases are put on analyzing Y-factor method which is the most widely-used noise figure measuring method nowadays in practical engineering and study.
本文介绍了噪声系数的几种测量方法，重点分析了目前实际工程和研究中最常用的噪声系数测量方法—Y因子法。
Due to semiconductor process we must trade off between input voltage standing wave ratio (VSWR) and Noise Figure. In this paper, a balanced LNA is adopted.
由于半导体工艺制程的关系，一般来说低噪声放大器噪声匹配和输入端驻波比匹配是矛盾的。
This paper presents a method of calculation of the noise figure of power travelling wave tubes which employ a conical Pierce gun to produce the electron beam.
本文给出了采用球形收敛枪的功率行波管噪声系数的计算方法。
To achieve high sensitivity, the pre-amplifier with very low noise figure is adopted in the design, and reliable grounding and shielding processing are performed.
为了获得高的灵敏度，本设计采用了噪声系数很低的前置放大器，并进行了可靠的接地、屏蔽等处理。
The low noise figure and high gain, coupled with low current consumption make it suitable for use in critical low-power GPS applications or during low-battery situations.
低噪声指数、高增益以及低电流消耗特性使其适用于关键的低功耗GPS应用或者低电量情形。
The noise figure of a microwave or millimeter-wave system basically lies on the noise of the front amplifier, so the Low Noise Amplifier (LNA) plays critical role for the receiving system.
微波、毫米波系统的噪声系数基本上取决于前级放大器的噪声系数，所以低噪声放大器是接收系统中相当重要的部件。
Based on the equivalent circuit model of a two-port optical receiver front-end, the relationship between the equivalent input noise current spectral density and the noise figure is analyzed.
根据光接收机前端等效电路模型，建立了噪声系数与等效输入噪声电流谱密度的关系。
For the requirement of high gain and low noise figure (NF) of the receiver RF destination, two LNAs most be cascaded, which is determined by each noise calculation of the two different LNAs.
接收射频前端的高增益和低噪声系数要求两级低噪放级联使用，通过计算低噪放的噪声估量确定了连接方式。
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.
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。
A mathematic model of funnel MCP is built. The theoretical evidence of reducing noise figure and improving the current gain is given. It will provide a theory foundation for further craft research.
建立了漏斗型MCP的数学模型，给出了降低MCP的噪声因子及提高电流增益的理论依据，为低噪声mcp进一步的工艺研究打下了基础。
This paper discussed the error in the measurement of noise figure—The method of Y factor , The error is caused by mismatch of RF attenuater and IF attenuater and the others in the measurement system.
本文讨论了常用的噪声系数测试方法—Y因子法中高频及中频衰减器本身失配和测试系统中其它部分的影响所造成的测试误差。
I was afraid sometimes in the beginning but I taught myself to figure out what was going on when I heard a noise.
刚开始我有时会害怕，但是我教会自己一听到一些声响时，就要去弄清到底是怎么回事。
At first we couldn't figure out why they made so much noise when it was time for them to go to sleep, but it was because someone had accidentally taken the toy from their basket.
起先我们不理解为什么睡觉时它们喜欢制造一些噪音出来，后来才明白原来是有人从它们的篮子里拿走了这个玩具。
More than that, it USES geolocation and ambient-noise-matching technology to figure out where a person is and then automatically shares his photos with other nearby people and vice versa.
更重要的是，通过使用地里位置和环境声音匹配技术，能够测算出某人所处的位置，并且自动与附近的人分享照片，当然他也能够分享别人的。
To see how changes in source capacitance can affect noise gain, let's again refer to the simplified ammeter model in Figure 2-15.
为了了解源电容如何影响噪声增益，再来看一下图2-15中的简化的安培计模型。
I was woken by a loud banging noise around 2.15am. I sat bolt upright in my bed and noticed a tall dark figure standing at the bottom of my bed.
凌晨大约两点一刻的时候我又被一声巨大的砰砰声给吵醒了，我立马直起身子，注意到我床尾处站着一个巨大的黑影。
I was woken by a loud banging noise around 2.15am. I sat bolt upright in my bed and noticed a tall dark figure standing at the bottom of my bed.
凌晨大约两点一刻的时候我又被一声巨大的砰砰声给吵醒了，我立马直起身子，注意到我床尾处站着一个巨大的黑影。
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