波形发生器毕业论文中英文资料外文翻译文献

1、中英文资料 波形发生器波形发生器 中英文资料外文翻译文献中英文资料外文翻译文献 THE DESIGN OF ARBITRARY WATHE DESIGN OF ARBITRARY WA VEFORM GENERATORSVEFORM GENERATORS The profile generator is can produce the massive standard signals and the user definition signal, and guarantees the high accuracy, high stable, the repeatability and the e

2、asy operational electronic instrumentation. The function profile generator has the continual phase transformation, and merits and so on frequency stability, not only may simulate each kind of complex signal, but also may to the frequency, the peak-to-peak value, the phase-shift, the profile carry on

3、 the tendency, the prompt control, and can carry on the communication with other instruments, the composition automated test system, therefore widely uses in the automatic control system, the vibration drive, the communication and the instrument measuring appliance domain. As early as in 20s, when t

4、he electronic installation just appeared, he appeared.Along with the correspondence and the radar technology development, the 40s appeared has mainly used in testing each kind of receiver the standard signal generating device, caused the signal generating device to become the quantitative analysis f

5、rom the qualitative analysis measuring instrument the metering equipment. Simultaneously also appeared available has tested the pulse electric circuit or serves as the pulse debugger the pulse signal generating device. Quite is complex as a result of the early signal generating device mechanism, the

6、 power quite is big, the electric circuit quite is simple, (with digital instrument, oscilloscope compares), therefore develops quite slowly.Only then appeared the first holocrystalline tube signal generating device until 1964. Since the 60s, the signal generating device had the rapid development, a

7、ppeared the function generator, has swept the frequency signal generating device, the composite signal generator, the program control signal generating device and so on the new type. Each kind of signal generating device performance index also had the large scale enhancement, simultaneously in the s

8、implification mechanism, the miniaturization, multi-purpose and so on various aspects also had the remarkable development. Before the 70s, the signal generating device mainly has two kinds: Sine wave and pulse wave, but the function generator is situated between two kinds, can provide the sine wave,

9、 the cosine wave, the square-wave, the triangular wave, the top chord wave and so on several kind of commonly used standard wave patterns, when has other profiles, needs to use the complex electric circuit and the mechanical and electrical union method. This time profile generator uses the simulatio

10、n electronic technology, moreover simulates the electric circuit which the component constitutes to have the size in a big way, the price expensive, the power loss big and so on the shortcomings, and must have the more complex waveform, then the electric circuit structure is extremely complex. At th

11、e same time, the main performance is two prominent questions, one is realizes the output frequency adjustment through the potentiometer adjustment, therefore adjusts very difficultly the frequency some fixture; Two is the pulse dutyfactor cannot adjust. After the 70s, the microprocessor appearance m

12、ay use the processor, A/D/and D/A, the hardware and the software causes the profile generator the function expansion, 中英文资料 has a more complex profile. This time profile generator many by software primarily, the essence is uses the microprocessor to the DAC procedure control, may obtain each kind of

13、 simple profile. But at the end of the 90s, appeared several kind of true high performances, the high price function generators, HP Corporation has promoted the model is the HP770S signal imitation installment systems, it had the software by the HP8770A random profile digitization and the HP1776A pr

14、ofile to be composed.HP8770A in fact also only can have 8 profiles, moreover the price is expensive. Soon after, Analogic Corporation has promoted the model is the Data-2020 multi-profile synthesizer, the model which Lecroy Corporation produces is 9100 random profile generators and so on. To the 21s

15、t century, along with the integrated circuit technology high speed development, appeared many kinds of operating frequency to be possible the GHz DDS chip, simultaneously also impelled the function profile generator development, in 2003, Agilent product 33220A could have 17 kind of profiles, the upp

16、er frequency may achieve 20M,2005 the year product N6030A could produce reaches as high as the 500MHz frequency, the sampling frequency may reach 1.25GHz.May see by above product, function profile generator development very quick in the last few years, on the international profile generator technolo

17、gical developmentmainly manifests in following several aspects:(1) quite was in the past narrow and small as a result of the frequency very low application scope, the output wave shape frequency enhancement, enabled the profile generator to apply in the more and more broad domain. The profile genera

18、tor software development is causing the profile data the input to become even more is more convenient and is easy. The profile generator usual permission with a series of spots, the straight line and the fixed function section stores the profile data the memory. Simultaneously may use one powerful m

19、athematics equation input way, the complex profile may compound become the v=f(t) form by several quite simple formulas the profile equation mathematical expression production.Thus promoted the function profile generator to the random profile generator development, each kind of machine language rapi

20、d development also played to the random profile generator software technology the impetus role. At present may use the visualization programming language (for example Visual Basic, Visual C and so on) compiles the random profile generator the soft kneading board, like this allows from the computer d

21、isplay monitor to input the random profile, realizes the profile input. (2) and VXI resources union. At present, the profile generator and is suitable by the independent table model instrument for the personal computer VXI module which inserted the card as well as recently develops. Because VXI main

22、 line gradually mature and to metering equipment high request, needs to use VXI system survey in very many domains to have the complex profile, VXI system resources have provided the obvious superiority, but because develops VXI module the cycle to be long, moreover needs the special VXI engine case

23、 the necessary use, causes the profile generator VXI module only to be restricted in the aviation, the military and the national defense and so on the large-scale domain. In the civil aspect, VXI module was inferior by far the table model instrument is more convenient. (3) along with the information

24、 technology vigorous development, the table model instrument after walked section of downhill, prospers. But the present new table model instrument shape, has the very big difference with several year ago oneself. These new generation of table model instrument has many kinds of characteristics, may

25、carry out many kinds of functions. Moreover the external dimensions and the price, all reduced compared to the past similar product one half. As early as in 1978, will announce the highest sampling frequency by American 中英文资料 Wavetek Corporation and Japanese East Asia Electric wave Industrial corpor

26、ation is 5MHz, may form 256 (memory length) the profile data, the vertical resolution is 8bit, mainly uses in vibrating, domain and so on medical service, material first generation of high performance supply oscillators, will pass through is near 30 years development, was following the electronic pr

27、imary device, the electric circuit, and the production equipment high speed, Gaoji Cheng Hua, the profile generator performance had the rapid enhancement. More and more becomes the operation to be simple output wave shape ability to be more and stronger. The profile operating procedure quality, is b

28、y the profile generator control software quality assurance, the edition function increases more much, the profile forms operationally better. The profile generator is the supply oscillator one kind, mainly for was measured the electric circuit provides oneself who needs to know the signal (each kind

29、 of profile), then is interested with other measuring appliance survey the parameter. Obviously the supply oscillator applies and experiments in test processing at each kind of experiment, its application is extremely widespread. It is not the metering equipment, but is according to users request, t

30、ook the drive source, the simulation each kind of spike, provides for is measured the electric circuit, satisfies the survey or each kind of actual need. At present our country oneself after start to develop the profile generator, and has yielded the encouraging result. But generally speaking, our c

31、ountry profile generator has not formed the true industry. Looked on the present domestic mature product that, many inserts the card for some PC instrument, the independent instrument and VXI system module are very few, and our country at present in profile generator type and performance all with ov

32、erseas similar product existence big disparity, therefore steps up to this kind of product development to appear imminently. 中英文资料 波形发生器的进展波形发生器的进展 波形发生器是能够产生大量的标准信号和用户定义信号，并保证高精度、 高稳定性、可重复性和易操作性的电子仪器。函数波形发生器具有连续的相位 变换、和频率稳定性等优点，不仅可以模拟各种复杂信号，还可对频率、幅 值、相移、波形进行动态、及时的控制，并能够与其它仪器进行通讯，组成自 动测试系统，因此被广泛用于自动

33、控制系统、震动激励、通讯和仪器仪表领 域。 早在 20 年代，当电子设备刚出现时，他就出现了。随着通信和雷达技术的 发展，40 年代出现了主要用于测试各种接收机的标准信号发生器，使信号发生 器从定性分析的测试仪器成为定量分析的测量仪器。同时还出现了可用来测试 脉冲电路或用作脉冲调试器的脉冲信号发生器。由于早期的信号发生器的机械 结构比较复杂，功率比较大，电路比较简单，（与数字仪器，示波器相比），因 此发展比较缓慢。直到 1964 年才出现了第一台全晶体管的信号发生器。 自 60 年代以来，信号发生器有了迅速的发展，出现了函数发生器、扫频信 号发生器、合成信号发生器、程控信号发生器等新种类。各类

34、信号发生器的性 能指标也有了大幅度的提高，同时在简化机械结构、小型化、多功能等各方面 也有了显著的发展。 在 70 年代前，信号发生器主要有两类：正弦波和脉冲波，而函数发生器介 于两类之间，能够提供正弦波、余弦波、方波、三角波、上弦波等几种常用标 准波形，产生其它波形时，需要采用较复杂的电路和机电结合的方法。这个时 期的波形发生器多采用模拟电子技术，而且模拟器件构成的电路存在着尺寸 大、价格贵、功耗大等缺点，并且要产生较为复杂的信号波形，则电路结构非 常复杂。同时，主要表现为两个突出问题，一是通过电位器的调节来实现输出 频率的调节，因此很难将频率调到某一固定值；二是脉冲的占空比不可调节。 在

35、70 年代后，微处理器的出现，可以利用处理器、A/D/和D/A，硬件和软 件使波形发生器的功能扩大，产生更加复杂的波形。这时期的波形发生器多以 软件为主，实质是采用微处理器对DAC的程序控制，就可以得到各种简单的波 形。 90 年代末，出现几种真正高性能、高价格的函数发生器、但是HP公司推出 了型号为HP770S的信号模拟装置系统，它由HP8770A任意波形数字化和 HP1776A波形发生软件组成。HP8770A实际上也只能产生 8 中波形，而且价格 昂贵。不久以后，Analogic公司推出了型号为Data-2020 的多波形合成器， Lecroy公司生产的型号为 9100 的任意波形发生器等。 到了二十一世纪，随着集成电路技术的高速发展，出现了多种工作频率可 过GHz的DDS芯片，同时也推动了函数波形发生器的发展，2003 年，Agilent的 产品 33220A能够产生 17 种波形，最高频率可达到 20M，2005 年的产品N6030A 中英文资料 能够产生高达 500MHz的频率，采样的频率可达 1.25GHz。由上面的产品可以看 出，函数波形发生器发展很快近几年来，国际上波形发生器技术发展主要体现 在以下几个方面