This paper introduces a numeral down converter control system.
本文介绍了一种数字式下变频器的控制系统。
A combination Low Noise Amplifier and down converter built into one device attached to the feed.
低噪声放大器和下变换器内置于连接到馈电的一个设备。
Based on these elements, the material design of if sample and digital down converter based on FPGA is specified.
在此基础上，介绍了中频数字采样单元和基于FPGA的数字下变频单元的具体设计。
The DSP, Digital Up Converter ( DUC ) and Digital Down Converter (DDC ) are key technology of a hardware-platform.
DSP和数字上变频和下变频技术是构建高频雷达通用硬件平台的关键技术。
This will avoid using special hardware of digital down converter, make hardware simpler and increase the flexibility of system.
从而有可能避免使用专用硬件下变频器，使硬件电路更简化和增加系统的灵活性。
Excellent as DC-DC converter used in notebooks computers, PDA and mobile handphones. Step-up or step-down converters, flash memory.
绝佳的笔记型电脑、个人数位助理和行动电话中的直流-直流整流器，增压或降压整流器及快闪记忆体。
The subject derives from the project of "C-band Down Converter" , which is contented with the satellite testing and controlling system.
为满足卫星测控业务的要求、完成C频段遥测信号的接收工作，本课题研制了C频段下变频器。
The real time processing of high speed data flow makes strict demands on the performance of descendant digital down converter in the wideband digital receiver.
在宽带数字接收机中，高速数据流的实时处理对后继数字下变频器性能提出了极为苛刻的要求。
Combining to devise radio telemetry receiver, the application of digital down converter and frequency demodulation in software radio is discussed and analysed.
结合无线电遥测接收机的设计，论述和分析了软件无线电技术中的数字下变频和调频数字解调技术在遥测接收机中的应用。
The design of hardware module includes A/D converter, DDC (Digital Down Converter) and DSP. The design and application of AD6640 and AD6624 are fully discussed in this part.
模块的硬件设计主要包括：A／D转换器、数字下变频器（DDC）以及DSP，详尽讨论了A／D 器件AD6640和DDC 器件AD6624的设计和应用；
The subject derives from the project of "C-band Down Converter" , which is contented with the satellite testing and controlling system. It deals with the signal from the satellite.
为满足卫星测控业务的要求、完成C频段遥测信号的接收工作，本课题研制了C频段下变频器。
At last, this thesis realizes digital down converter based on FPGA, and the whole designing process includes algorithm simulation, VHDL description, FPGA simulation and real system test.
最后，基于FPGA对数字下变频进行了设计及实现，具体包括：算法仿真、VHDL描述、FPGA仿真和实际系统测试。
The receiver unit mainly consisted of the digital down converter, matched filter, integration and dump module, power detector, symbol tracking processor, differential demodulator and so on.
接收部分主要是扩频系统的数字下变频、积分清洗、匹配滤波器解扩、功率检测、符号跟踪、差分译码等技术。
In this paper, the high decimation ratio of digital down converter is studied and the multi-stage decimation algorithm is especially analyzed based on CIC filter, CFIR filter and RRC filter.
研究了高倍抽取的数字下变频设计，重点分析了基于级联积分梳状滤波器、级联补偿滤波器、级联根升余弦滤波器的多级抽样频率算法。
In the software design, the parameter setting of digital down converter, the application program of this receiving system and the design of ADSP2191 "s monitoring program are mainly introduced."
在软件方面，主要介绍了数字下变频器的参数设置、接收系统的应用软件设计以及系统核心芯片ADSP2191的监控软件设计。
The basic concept and architecture of software radio is introduced in this paper. And a type of software radio receiver based on programmable digital down converter (DDC) -hsp50214b is presented.
介绍了软件无线电的基本思想及结构，提出了一种基于可编程数字下变频器HSP50214B的中频软件无线电接收系统的设计方案。
You're not going to be responsible for the converter anymore, and you shut it down.
您不想再负责转换器的工作，将其关闭了。
Comparing to step-down resonant switched capacitor(RSC) converter, the composing principle of step-up RSC converter is different, so their sneak circuit conditions are not same.
相对于降压式谐振开关电容变换器，升压式谐振开关电容变换器构成方式不同，潜电路发生条件也有较大区别。
The current should therefore be reduced before accelerating so the converter can cool down.
因此电流在加速前被减少，从而变频器可以冷却。
By applying cooling down method of adding factory air into the HP system, shortens urea converter cooling down time to a large scale and decreases shutdown losses for enterprise.
通过采用向尿素合成塔加入工厂空气的降温方法，与传统方法相比大幅度缩短降温时间，为企业减少停工损失。
This thesis begins with the introduction of the basic step-down DC-DC converter, then some control methods and key system specifications.
本文首先从DC-DC变换器的工作原理入手，介绍了系统的基本控制原理和指标要求。
One kind of down-hole full-spectrum acquisition controlling sequence generator and anode high-voltage converter is synthesized, which is suitable for pulsed-neutron synthesized logging tool.
研制了一种适用于脉冲中子测井仪的井下全谱采集控制综合时序发生器和阳极高压变换器。
A clock or a strobe signal is used to synchronise operation of the comparator, the up-down counter 102 and the digital to analog converter 100 so as to avoid these components racing.
时钟或者选通信号用于比较器、递增-递减计数器102和数模转换器100的同步操作，以便避免这些部件竞争。
The evaluation kits allow the evaluation of the CDMA and GPS low-noise amplifiers(LNA) , as well as the CDMA and GPS down-converter mixers , without the use of any additional support circuitry.
无需其他额外的支持电路，利用该评估板即可实现对CDMA和GPS低噪声放大器（LNA）和下变频混频器的评估。
The above-mentioned parts along with advanced traction motor system and converter system bring the noise down by 20% compared with those of traditional products.
加之在列车动力系统安装先进牵引电机系统、变流器系统等，设计出的整车噪音较传统产品减少两成以上。
The above-mentioned parts along with advanced traction motor system and converter system bring the noise down by 20% compared with those of traditional products.
加之在列车动力系统安装先进牵引电机系统、变流器系统等，设计出的整车噪音较传统产品减少两成以上。
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