amplifer造句

• Bi - directional trunk amplifer
  双向干线放大器
• The device is also widely used to measure the amplitude frequency characteristic of instrument in the tv - broadcastiong field , such as filter , amplifer , ect
  该仪器主要针对高频调谐器的测量,也可用于广播电视领域中滤波器件、放大电路等的生产测试。
• In modern wireless communication , linear power amplifer is necessary and play a critical role , and even the whole communication system will be affected by its performance
  在当代无线通信系统中，线性功率放大器是必不可少而且也是非常关键的部分，其性能的好坏将影响整个通信系统的指标。
• Abstract this paper gives two kinds of single operational amplifer ? current - mode active filter circuits . they can realize lowpass , highpass and ? bandpass without changing circuit topology and element
  摘要提出两种使用单运放的电流型滤波电路,每种电路均可同时实现带通、低通和高通滤波功能
• In modern wireless communication , high linear broadband amplifer is necessary and play a critical role , and even the whole communication system will be affected by its performance
  随着当代无线技术的发展,微波宽频带放大器已经成为无线通信系统的关键组成部分,其性能好坏将影响整个通信系统的性能。
• This subject aim at designing a series of several octaves band and low noise figure middle power mini - package amplifer which frequency include 1 - 8ghz 、 1 - 18 ghz and 5 - 10ghz band , using non - packaged gaas phemt and mic technology , under the basic of analyzing and searching broadband matching technology
  本文所报道的系列微波放大器具有多倍频程带宽、低噪声、中功率、微封装等特性,工作频段包括1 - 8ghz 、 1 - 18ghz 、以及5 - 10ghz 。
• This subject aim at designing a linear power amplifer whose output power is 40w for 225 - 450mhz band . but it seems not easy to finish the task because of this power amplifier own unique requirements including high output power , broad working frequency band , high linearity , and flat gain . due to the complexity involved , theoretically several soltuions are derived in the final scheme such as broadband matching technology , power - retreat , power synthesize , automatic power control and negative feedback . in addition , the design will be optimized by eda software and the final test result indicates that our design is successful
  本课题的目标是研制一个输出功率为40w的225 450mhz的线性功率放大器。由于该功放要求输出功率大，工作频带宽，带内增益波动小，线性度高，所以其终合设计难度大。鉴于这个原因，在理论设计上笔者采用了宽带匹配、功率合成、功率回退、负反馈、自动功率控制等技术；在实践中精心设计电路，并且配合eda软件仿真，最终达到所要求的指标。
• Also , by using the hot - carrier immiunity analog circuit structure , the output resistance degradation caused by the hot - carrier degradation is deeply supressed and the small - dimensional effect can be improved shown by the spice 3f5 simulation results , and the gain degradation of a cmos o peration amplifer after 10 years operation decreases from 23 % to 10 % with this structure according to bert2 . 0 simulation
  而串联常开n mosfet的模拟电路结构可使n mosfet输出电阻的退化大为减小同时还可改善器件小尺寸效应引起的输出电阻下降：采用该结构的os运放与未采用的相比，其十年工作后增益的退化由23下降为10 。
• The basic principle , main properties , typical parameters , technical characteristics and general situation of klystron are introduced . the electron beam prebunching in the modulated cavity and shift tube of relativistic klystron amplifer ( rka ) is studied analytically , a self - consistent equation of radiation generated by the prebunched electron beam in the radiation cavity is derived using the field method of particle ? wave interaction instead of the electrical circuit method , and in terms of it , the gain in the linear regime calculated , a field analysis method is proposed . the theory analysis shows that the characteristic parameters , such as resonance frequency , real part of gap - impedance , external quality fadtor in all kinds of klystron output circuits including single - beam , multi - beam , single - gap , multi - gap , single - beammulti - gap , multi - beam multi - gap klystron output circuit , can be calculated by the field analysis method
  本文系统的介绍了速调管的工作原理、主要特点、发展概况、主要性能指标和技术特点,解析的研究了电子束在相对论速调管放大器的调制腔和漂移管中的预群聚;用粒子波互作用的场方法导出了在辐射腔中预群聚电子束产生辐射的自洽方程,同时对线性区的增益进行了计算。理论分析表明,场分析法可用于计算单注单间隙、多注多间隙、单注多间隙和多注多间隙速调管输出回路的谐振频率、间隙阻抗实部和外观品质因数等特性参数。