查询词典 power amplifier

PHS system still has great market in China at present, and relevant technology is in the grasp of Japanese. Therefore, the relevant research of PHS system natural value and especially study power amplifier transmitter of high power base station.

目前PHS系统在中国大陆仍存在著极大的市场，而相关技术又掌握在日本人手中，因此PHS系统之相关技术值的研究，尤其是在大功率基地台发射用功率放大器这方面。

150W monophonic constant-voltage audio power amplifier, high-power overmeasure, high reliability.

150W定压式音频功率放大器，大功率裕量，高可靠性。

In this way, the demodulation arithmetic and pulse compression of multi-channels can be packed into a single FPGA.To compensate the nonlinear effect of power amplifier, a successive overrelaxation iterative method of digital predistortion is applied here to ensure the low sidelobe performance, high output power and fast iterative speed.

分析了功放非线性对超低副瓣脉冲压缩信号的影响，基于射频功率放大器、矢量信号发生仪和矢量信号分析仪，采用松弛迭代法实现并优化了功放数字预失真算法，提高了迭代收敛速度与稳定度。

So it's worth to design an Audio Power Amplifier with the features of high power and high efficiency.

因此，设计一种失真度小，输出功率大，效率高的音频功放也有很重要的现实意义。

And then the paper introduces the design of power amplifier and DC regulated power supply.

论文重点介绍了功率放大器和直流稳压电源的设计。

The limitation of power amplifier design in CMOS process is analyzed first. Then we construct and analyze the model of power transistor by using Matlab software.

首先分析了CMOS工艺对功率放大器设计的限制，然后使用Matlab对功放晶体管进行建模，分析其功率特性，通过仿真，提出了CMOS功率放大器的设计和调试方案。

Because of the self-control module, the linearization power amplifier system can work steadily in defiance of the changing of temperature, time, input power etc. It makes the system more practicably and expends the use of linearization system.

由于加入自适应控制模块，射频电路不受温度、时漂、输入功率等的影响，可始终处于较佳工作状态，这使得整个放大系统更为实用，也更具有拓展价值。

MSP430F169 microcontroller was the core components of control and measurement function of an electromagnetic relay characteristic parameter tester. The tester also included DC power module, power amplifier module, constant current source module, keys, and digital tube display module. The tester could test the data of 943-1C-12DS electromagnetic relays including the minimum pull-in voltage, maximum release voltage, relay coil voltage rating when the pull-contact time, release time as well as the contact value of the contact resistance. The system could complete automatic measurement parameters to achieve all the basic requirements of design. And all of the test data was displayed through the 74HC573 digital tube.

摘 要：以MSP430F169单片机作为控制和测量的核心部件，辅以直流稳压电源模块、功率放大电路模块、恒流源模块、按键和数码管显示模块等组成一个电磁式继电器特性参数测试仪，完成对943-1C-12DS电磁式继电器最小吸合电压、最大释放电压、继电器线圈电压为额定值时的触点吸合时间、释放时间以及触点接触电阻值的测试，该系统能够实现成套参数自动测量，所有测试数据通过74HC573数码管进行显示。

Using the coil with low resistance and magnetic-core with high magnetic conductivity in the transformer and inductor to reduce the power loss and increase the efficiency.The elements and structures of some functional unit of power amplifier are analyzed.

然后从双端口网络的散射矩阵和功率传输增益函数入手，对常用的单、双谐振点匹配技术和原始实频法进行了论述，给出了原始实频法的计算机实现过程以及设计中的注意事项。

With the purpose that people in countryside and rural area can listen to the sounds of Communist Party and Chinese government,"Xi Xin Project"has been carried out State General Bureau of the Radio and Television and set up tens of 500KW SW Radio transmitters, ten of them were installed ,whom were TH558 with find power amplifier,a kind of Ultrahigh power mental-ceramic tetrode from French Thomson company.

为使我国广大农村和边远山区群众能听到党和政府的声音，国家广播电视总局组织实施了"西新工程"，部署了数十部500kW短波广播发射机，其中十部的末级功率放大管采用法国汤姆逊公司生产的TH558超大功率金属陶瓷四极管。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。