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
Design and Implementation of Amplifier with Low Noise for UWB Signal Detection 超宽带信号低噪放大电路的设计与实现
Due to its relative low amplitude properties, the bioelectricity signal is easy influenced by surrounding factor, the amplifier with low noise and voltage offset is required. 由于生物电信号非常微弱,容易受量测环境及电路本身等因素所影响,故要求该放大器具有低噪声和低失调电压的性能。
Circuit Model of a Semiconductor Laser Amplifier and Its Noise Characteristics Analysis 半导体激光放大器的电路模型及噪声特性分析
The article analyzes background noise, amplifier noise and detector noise in detail from fixed character of infrared dim-small target image, also processes the infrared image and separates targets from the image. 文章主要对红外弱小目标图像中的背景辐射噪声、放大器噪声、探测器噪声进行了详细的定性分析,并对红外图像进行处理,从图像中分离出了弱小目标。
This paper describes the modeling, design, fabrication and performance of a monolithic 2~ 26 GHz GaAs Power Amplifier with low noise characteristic. 报道了一个具有低噪声性能的2~26GHzGaAs超宽带单片功率放大器的研究结果,介绍了模型提取、电路设计和单片制作的全过程。
The results show: when the modulated Raman pump is sited following each amplifier, the random walk of dark solitons induced by amplifier spontaneous emission noise is reduced apparently, and the interaction between two dark solitons is suppressed well. 研究结果表明:在暗孤子传输系统中,每个放大器后插入调制拉曼泵浦进行传输控制,不仅可以有效地抑制暗孤子的时间抖动,同时还明显降低了暗孤子间的相互作用。
The experimental layout of high power optical fiber amplifier and low noise figure optical fiber preamplifier is given. 给出了高功率光纤放大器和低噪声前置光纤放大器的实验方案。
The model based on the exterior character of EDFA has fast operation and also considers the saturation, uneven gain character and non-uniform amplifier spontaneous emission noise spectrum character of EDFA. 该模型基于EDFA的外特性,运算速度快,同时考虑了EDFA的饱和、增益不平坦特性以及ASE噪声谱的非均匀性。
This paper analyzes influence on soliton communication systems by some factors, such as fiber loss, amplifier noise, interaction between solitons, collisions among different channels in WDM systems and so on. 本文首先深入研究了光纤损耗、放大器噪声、孤子间的相互作用、WDM系统中不同信道间孤子的碰撞以及其他因素对孤子通信系统性能的影响。
We present a practical model for optical amplifier noise amplifier noise analysis and its application in conventional intensity modulation-direct detection ( IMDD) optical transmission systems. 本文介绍了光放大器的噪声分析以及作为光前置放大器在强度调制-直接检测(IMDD)光纤传输系统中的应用。
In this paper, repairs of high voltage source malfunction and ionization amplifier noise interference, and adjustment experiment on electrodes in ionization chamber are discussed. 本文叙述了102G型气相色谱仪的高压电源故障和电离放大器噪声干扰的排除以及离子室电极的调整经验。
Simulation results show that by using this iteration algorithm, the flattened gain can reach the possible highest value of the original amplifier, and noise penalty is the minimum. 模拟计算结果表明,用该方法得到的滤波谱能使放大器的增益平坦在原放大器可能得到的最高增益水平,同时因滤波器的引入带来的噪声特性恶化也最小。
Phase noise extracting and acquiring self-adaptive controlling module, spectrum estimation module, self-adaptive error compensation ( including error compensation of amplifier gain of noise channel) module, data displaying and outputting module. 该系统软件包括了仪器软面板、相位噪声提取和采集的自适应控制、频谱估计、自适应误差校正(还包括对噪声信道的增益误差校正)、结果数据的显示与输出处理等。
By means of applied technology of IC operational amplifiers, digital to analog converter and single chip microcontroller, a programmable precision measuring differential amplifier with low noise, low drift, high input impedance and high common mode rejection ratio is developed and introduced. 介绍了一种由DAC电压衰减器作为集成运放反馈电路的低噪声、低漂移、高输入阻抗和高共模抑制比的可编程精密差动测量放大器。
This paper discusses the input matching circuit and the effect of the amplifier structure on noise performances. 本文从低噪声FET放大器的实际设计出发,分析了输入匹配电路对噪声性能的影响。
Low noise design for amplifier with related noise source 噪声源相关的低噪放大器设计
Parametric Amplifier Input Noise Temperature Degradation Caused by an Interfering Signal in or near the Paramp Passband 干扰信号对参放输入噪声温度的影响
The results show that pump mode has less effect on gain than noise figure, and the fiber amplifier has low noise under forward and bi-direction pumping schemes at optimal fiber length. 结果表明,抽运方式对增益影响较小,但对噪声特性影响较大,光纤达最佳长度时,正向和双向抽运方式的掺Yb3+光纤放大器要优于反向抽运方式。
Operational Amplifier Noise Model and Its Accurate Measurement 集成运算放大器的噪声模型和精确测量
Methods to Reduce Amplifier Noise 减少放大器噪声的方法
The effect of optical amplifier noise and the four wave mixing in optical fiber on the performance of the multichannel FSK direct and heterodyne detection transmission system with cascaded optical amplifiers is discussed. 研究了光纤放大器噪声和光纤四波混频(FWM)对级联光纤放大器多通道传输系统性能的影响。
By the use of En-In amplifier noise model and frequency response of thermopile signal, the chip of advance amplification which was especially fit for thermopile was chosen after comparing the capability of several kinds of chips. 利用En-Iη放大器噪声模型和该电动势的频响特性为依据,在比较了若干种运算放大器芯片的性能之后,选择了适合于热电堆传感器的前级运算放大芯片。
After the gain controllable amplifier with low noise, then select frequency by preselected tracking filter again, the interference and noise are eliminated further. 由增益可控的低噪声放大器放大后,再次由数控电调谐跟踪滤波器选频,进一步滤除干扰和噪声。
Design, simulation and realization of power amplifier and low noise amplifier are discussed in this article, including RF amplifiers circuit and DC feed circuit. 基于工程开发的需要,本文讨论了功率放大器和低噪声放大器的设计、仿真及整个电路的实现方法,包括射频放大电路和直流馈电电路,并提供了相关的仿真结果和测试结果。
Microwave devices and microwave technology are two major factors to promote the development of microwave power amplifier and low noise amplifier. 微波器件及微波技术的发展是推动微波固态功率放大器和低噪声放大器发展的两大因素。
The remote control circuit adopts power amplifier circuit and low noise amplifier circuit to improve transmission power. 遥控电路中还设计了功率放大电路与低噪声放大电路来提高数据发送功率以增加数据传输距离。
The amplifiers are low phase noise amplifier, which uses the HBT to replace the classical X band HEMT FET to reduce the amplifier phase noise. 其中放大器采用低相位噪声放大器设计,利用异质结双极型晶体管代替传统X波段高电子转移率场效应晶体管以降低放大器相位噪声。