High-frequency narrowband signal obtained by frequency mixing will increase signal-to-noise ratio(SNR) so as to expand the dynamic range of the measurement in the logarithmic transformation.
采用混频法获得一定增益的窄带高频信号,可以提高信噪比,进行对数变换时可以提高测量的动态范围;对小信号时出现的平方律检波导致对数变换时多出的乘2因子,给出了双对数通道的解决方案;对各级放大电路,提出了调零电路的调试方法,以减小零点漂移带来的影响。
In order to realize subnanometric resolution, a signal process system based on frequency multiple, frequency mixing and FPGA for high frequency counting is established.
采用电子倍频、混频、高频计数的方法可处理外差信号实现亚纳米分辨率，具有电路简单、能计大数的优点，但会引入电子信号的相位畸变，引入测量的动态误差。
In this paper,a new pre-distortion linearizer is proposed,which uses twice frequency mixing operation to generate predistortion signal.
在普通的预失真技术基础上,提出了一种二次混频预失真线性化器,其非线性失真信号通过二次混频产生,并给出了该电路的应用方式,从理论上对其特性进行了分析,计算机仿真结果表明:使用这种预失真技术能有效抑制三阶交调。
Based on an analysis of UHF(ultra-high-frequency)characteristic of PD(partial discharge) in power transformer,using mixing technique,a signal disposal cell has been devised for the sake of facilitating common data sampling card.
在分析了电力变压器局部放电的超高频特性的基础上,利用混频技术,设计了局部放电超高频信号的信号调理单元,方便普通数字采集卡采集。
A mixing measurement system on pulse tube cryocooler is designed.
设计制作适用于小型脉冲管制冷机上的高温超导混频实验测量系统 ,并对其制冷量进行了理论上的估算和实际测量。
Multiorder multiplyingmixing is adopted in the designed comparison system to increase the frequency deviation that can be measured.
所设计的频率标准比对系统采取多级倍频 混频方式使频率偏差逐级扩大后再测量,从而避免了直接进行高次倍频的困难,提高了测量精度,可以对高精度的频率标准的准确度、长短期频率稳定度进行快速测量,是一种高精度时畴参数测量系统。
Design of LNA and Mixer in Receiver Front-end;
接收机前端低噪声放大器与混频器的设计
This paper describes the design and fabrication of an L-band microwave image jection mixer assembly.
介绍一种Ｌ波段微波镜象抑制混频组件的设计和制作。
This paper studies a millimeter mixer designed used for the short range radar.
研究一种用于近程雷达的毫米波混频器设计,通过环行器来实现本振和信号的输入,环行器的功率分配可根据雷达的作用距离来进行设计,采用鳍线结构来实现混频器的匹配输入。
Based the multiplication characteristics in analogue multiplier, this article introduces its applied mechanism in many fields such as frequency modulation, phase modulation, mixed frequency, synchronous detection and so on.
本文由模拟相乘器具有的乘法特性出发,介绍其在调频、调相、混频、同步检波、鉴相等诸多领城的应用机理,并以具体的MC1496模拟乘法器为例介绍一些高频电子技术中的实用电路。
mixer-filter frequency synthesizer
混频滤波式频率合成器
image reject mixer
象频干扰抑制混频器
synchronous mixer
同步混合器同步混频器
oscillator-mixer-first detector
振荡-混频第一检波器
wideband image recovery mixer
宽带图象恢复混频器
Semiconductor diode mixer
半导体二极管混频器
Semiconductor triode mixer
半导体三极管混频器
microwave mixing crystal diode
微波混频晶体二极管
One who mixes the audio components of a recording.
混频者把一个录音的音频成分混合起来的人
Transient Coherence Four-and Six-wave Mixing Spectroscopy with Phase-conjugation Geometry;
瞬态相干相位共轭四波混频和六波混频光谱术
" Mixers, radio frequency, general specification for"
GB/T13415-1992射频混频器总规范
heptode converter
五栅管混频器五栅管变频器
A Simple and Easy Test Method of Conversion Loss of a Mixer
混频器变频损耗的一种简易测试方法
A High Linear CMOS Up-Conversion Mixer;
高线性度的CMOS上变频混频器设计
Design of RF CMOS Mixer for 3G Application;
应用于3G的射频CMOS混频器设计
Design of 2.1 GHz RF CMOS Mixer
2.1GHz射频CMOS混频器设计(英文)
DDC Technology Based on Digital Orthogonal Mixing
基于正交混频的数字下变频技术研究
high and low frequency connector with mixed contact
高低频混装式连接器