But nowadays most of the induction supplies are discrete systems controlled by regulated resistance . they do not have human - machine interfaces and communication interfaces ; as a result , they cannot meet the requirement of modern production 目前的感应加热电源大多是分立元件控制系统，由电位器控制，不具有良好的人机界面和通讯系统，自动化程度不高，并且不符合现代企业对生产的要求。
The related theories , methods and processes of amplifier design are introduced , and some simulations on the amplifier with ads are done . a low noise amplifier with wider 1db compression point is designed , the performance curves of the amplifier are shown 主要介绍了分立元件设计放大器的相关理论、方法和步骤,采用ads仿真软件对放大器进行仿真,此方法简单适用,其仿真结果与实际吻合较好。
Compared with primal test stand , it spares units composed of large discrete components , lessens welded points . it greatly improves work reliability , test automation degree , test precision and efficiency . it is convenient for use , maintenance and repair 与原试验台比较，省去由大量分立元件组成的单元环节，减少焊接点，大大提高工作可靠性、检测自动化程度、检测精度和效率，使用、维护和修理方便。
Monolithic microwave integrated circuit ( mmic ) designs on si substrates have become an important topic in recent years . with constantly increasing frequencies in communications and integrated circuits , there are great demands for low - cost , miniature microwave transmission lines 采用以硅材料为衬底及与ic兼容的微电子机械( mems )技术，能够实现微波无源分立元件与信号处理电路的单片集成化，最终形成完整的和智能化的在片系统。
First of all , because rf circuit has large numbers of passive devices , especially for integrated inductor in si cmos technology , not only take big area on cmos chips , but also has notable parasitic effect , its quality factor is far lower than separated inductor , thus greatly impacts the performance of rf circuits 首先,针对rf电路含有大量无源元件的特点,特别是sicmos工艺条件下的片上集成电感,不但占用大量的芯片面积,而且寄生效应影响显著,其品质因数远低于分立元件电感,而集成电感的品质特性极大地左右了电路的性能。
Wp - le series intelligent electric power instrument is a kind of new electric power display control instrument developed and produced by wideplus company . it has adopted advanced micro - processor as its core component , it has many characteristics such as precise measurement , visual and clear display , perfect performance , good stability , strong anti - interference capability , high universality and reliability , superior performance and favorable price etc , can replace the point type instrument or normal digital display instrument including the digit display instrument constituted by electronic discrete components and universal integrated circuit Wp le系列智能电力仪表是上润公司开发生产的一类新型电力显示控制仪表，采用了先进的微处理器作为核心部件，具有测量精确，显示直观清晰，功能完善，稳定性好，抗干扰性能强，通用性和可靠性高，性能价格比优等特点，可替代指针式仪表或常规数字显示仪表包括由电子分立元件和通用集成电路构成的数显仪表。
The 6psd30 - 1 fuel injection pump test stand is the 1970 ' s product and leave unused . its electrical control part is made up of large discrete components with low - test sensitivity , inconvenient setting and adjustment , high trouble rate . moreover , its circuit components are aging and spoiled 6psd30 - 1型电子控制喷油泵试验台是七十年代的产品，其电气控制部分电路采用大量分立元件构成，测试灵敏度低，设定调整不方便，故障率高，而且电路元件大多老化、损坏，现处于闲置状态。
The traditional ssr responder has poor performance in its stability and reliability because it is mostly made up of single component and middle or small scaled integrated circuits . it can not meet the requirements of high - density and large amount replies for its limit performance of real time processing ability 由于传统的二次雷达( secondarysurveillanceradar )应答信号处理器采用分立元件和中小规模集成电路设计,其稳定性低,可靠性差,实时处理能力有限,不能完成高密度、大容量的应答。
At first the switching power amplifiers of the discrete components are researched and some application circuits for amb power amplifiers are developed . secondly the integrated power amplifier is discussed , a new type of pulse width modulation ( pwm ) power amplifier applying sa60 is designed and used in amb system . in the end of the dissertation several synthesized tuning measures and some experimental results for amb system are presented 首先讨论了分立元件开关功率放大器原理并研制了在电磁轴承中的应用电路；其次讨论了集成功率放大器，应用sa60设计了新型脉宽调制功率放大器并在电磁轴承中应用；在论文的最后给出了电磁轴承系统综合调试的一般方法及调试结果。
It has been playing an important role in equipping all kinds of arms and services for campaigns , tactical exercises and emergent actions etc . based on the detailed analysis of the exchange ' s architecture and implementing , this thesis points out some disadvantages of the device , such as too many absolute components , not very high enough reliability and security , very large size and weight , operating and maintaining difficultly . considering low power requirement and man - machine interface optimizing design at the same time , the thesis come up with an integrated design scheme to the previous device based on " mcu + cpld / fpga architecture " : ( 1 ) signal frequency dividing , timing frequency producing , 20 customers " led states controlling are implemented in cpld ; ( 2 ) decoding , latching data and controlling signals are implemented in cpld by bus interface between mcu and cpld ; ( 3 ) chip selecting principles and mcu idle mode design are completed under the consideration of low power requirement ; ( 4 ) operation by chinese lcd menus is adopted in the man - machine interface 本项目以该交换机为研究对象，在详细分析原设备的系统结构和功能实现方式的基础上，指出该机型在使用过程中存在技术相对陈旧、分立元件过多、可靠性和保密性不够、体积大、重量大、维修困难等问题，同时结合系统的低功耗需求和优化人机接口设计，本文提出基于“单片机+ cpld fpga体系结构”的集成化设计方案：在cpld中实现信号音分频和计时频率生成电路、 20路用户led状态控制电路； cpld与单片机以总线接口方式实现译码、数据和控制信号锁存功能的vhdl设计；基于低功耗设计的器件选型方案和单片机待机模式设计；人机接口的lcd菜单操作方式。
