波形发生器的进展中英文翻译

1、THE DESIGN OF ARBITRARY W AVEFORM GENERATORSThe 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 easy operational electronic instrumentation. The function profile generator has the c

2、ontinual 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 the tendency, the prompt control, and can carry on the communication with other ins

3、truments, 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 20's, when the electronic installation just appeared, he appeared.Along with the corresponde

4、nce and the radar technology development, the 40's 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 from the qualitative analysis measuring instrument the metering equipment. S

5、imultaneously 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 power quite is big, the electric circuit quite is simple, (with digital in

6、strument, oscilloscope compares, therefore develops quite slowly.Only then appeared the first holocrystalline tube signal generating device until 1964. Since the 60's, the signal generating device had the rapid development, appeared the function generator, has swept the frequency signal generati

7、ng 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 simplification mechanism, the miniaturization, multi-purpose and so on v

8、arious aspects also had the remarkable development. Before the 70's, 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, the cosine wave, the square-wave, the triangular wave, the top ch

9、ord 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 simulation electronic technology, moreover simulates the electric circuit wh

10、ich 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 the same time, the main performance is two prominent questions, one i

11、s 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 70's, the microprocessor appearance may use the processor, A/D/and D/A, the hardware and the softwa

12、re causes the profile generator the function expansion, 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 simple profile. But at the end of the 90's, appeared several ki

13、nd 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 profile to be composed.HP8770A in fact also only can have 8 profi

14、les, moreover the price is expensive. Soon after, Analogic Corporation has promoted the model is the Data-2020 multi-profilesynthesizer, the model which Lecroy Corporation produces is 9100 random profile generators and so on.Moreover the external dimensions and the price, all reduced compared to the

15、 past similar product one half. As early as in 1978, will announce the highest sampling frequency by American Wavetek Corporation and Japanese East Asia Electric wave Industrial corporation is 5MHz, may form 256 (memory length the profile data, the vertical resolution is 8bit, mainly uses in vibrati

16、ng, 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 primary device, the electric circuit, and the production equipment high speed, Gaoji Cheng Hua, the profile generator p

17、erformance 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 bythe profile generator control software quality assurance, the edition function increases more much, the profile form

18、s 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 of profile, then is interested with other measuring appliance survey the parameter. Obviously the supply oscillator a

19、pplies 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 user's request, took the drive source, the simulation each kind of spike, provides for is measured the electric circuit, satisfies

20、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 country profile generator has not formed the true industry. Looked on the present domestic mature product that, many

21、 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 overseas similar product existence big disparity, therefore steps up to this kind of product development to appear im

22、minently.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

23、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

24、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HP8

25、770A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 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:(1过去由于频率很低应用的范围比较狭小,输出波形频率的提高,使得波形发生器能应用于越来越广的领域。波形发生器软件的开发正使波形数据的输入变得更加方便和容易。波形发生器通常允许用一系列的点、直线和固定的函数段把波形数据存入存储器。同时可以利用一种强有力的数学方程输入方式,复杂的波形可以由几个比较简单的公式复合成v=f(t形式的波形方程的数学表达式产生。从而促进了函数波形发生器向任意波形发生器的发展,各种计算机语言的飞速发展也对任意波形发生器软件技术起到了推动作用。目前可以利用可视化编程语言(如Visual Basic, Visual C等