外文翻译-基于C8051单片机的双相信号发生器软件设计.doc

外 文 翻 译 毕业设计题目：基于C8051单片机的双相信号发生器软件设计 原文1：The brief introduction of traditional signal generator 译文1：关于传统信号发生器的简介 原文2：The basic principle of DDS signal generator 译文2：关于DDS信号发生器的基本原理 The brief introduction of traditional signal generator (原文1)Abstract In the 21st century, the signal generator has obtained a wide range of applications and rapid development of signal generator as the basic electronic instruments in the field of electronic technology, widely used in aerospace measurement and control, communications systems,electronic counter measures, electronic measurement, research in various fields. It can meet many of the requirements of the test system, and has become an integral part of system test. Besides, with technology advanceshas, the signal generator as a general experimental source has played a pivotal role in todays electronic experimental design. 1 Introduction signal is a generator with the longest measuring instruments, as early as the 1920s when the emerging electronic equipment it has. As the communications and radar technology development, 40 in a major test for a variety of standard receiver signal generator so that the signal generator from the qualitative analysis of the test equipment developed into a quantitative analysis of the measuring instruments. At the same time there also can be used to measure pulse circuit or pulse modulator for the pulse generator.Since the early signal generator mechanical structure more complicated, more power, the circuit is relatively simple, relatively slow pace of development. Until 1964 there was the first all-transistor signal generator. Since the 1960s, since the signal generator with the rapid development of a function generator, this period of analog signal generator use of electronic technology, by discrete components or analog integrated circuits constituted, the circuit structure complicated and can only have a sine Wave, square wave, sawtooth and triangle wave, and so few simple wave, because the an