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上传于：2013-12-31

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    188宝金博页面版: 信号发生器的发展现状

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    内容提示： Development of signal generator Along with electronic technology's development, the circuit testing was already getting higher and higher to signal generating device's request. Except that outside the production standard wave pattern like sine wave, the square-wave, the triangular wave, the pulse wave, the signal generating device must use in analog output some anomalous signals, produces “the actual environment” the signal, including, in was measured the equipment leaves when the laboratory or the wor...

    文档格式：DOC | 页数：10 | 浏览次数：95 | 上传日期：2013-12-31 17:35:50 | 文档星级：
    Development of signal generator Along with electronic technology's development, the circuit testing was already getting higher and higher to signal generating device's request. Except that outside the production standard wave pattern like sine wave, the square-wave, the triangular wave, the pulse wave, the signal generating device must use in analog output some anomalous signals, produces “the actual environment” the signal, including, in was measured the equipment leaves when the laboratory or the workshop possibly meets burr, drifting, noise and other unusual events and so on. All these request the signal generating device output signal the parameter like frequency, the profile, the output voltage or the power and so on, can based on this make a more precise adjustment, and has a better stability and the output instruction. in 1975 the random profile generator developed successfully, made the signal generating device product to increase a new variety. In the random profile generator as the survey before the signal drove the source enters the market, to produce the nonsine wave signal, has used the function generator to provide the triangular wave, the wave tilt, the square-wave and the cosine wave and so on several kind of special profiles. The sound and the vibration analysis need to modulate complex supply oscillator, so that simulation real signal, only then draws support from the random profile generator, for example the medical instrument test often needs the heart electricity profile, the random profile generator is very easy to produce each kind of non-standard vibration signal. 资料来源 360毕业设计网 www.bysj360.com the early time's random profile generator mainly emphatically tonal range, present's random profile generator expanded to the radio frequency frequency band, it with digital oscilloscope (DSO) close coordination, so long as the digital oscilloscope capture's signal, the random profile generator can duplicate the similar profile. In the electric circuit constitution, the digital oscilloscope is the simulation/digital conversion, the random profile generator is the digital/simulation counter transformation, at present is random the profile generator the band width to achieve 2GHz, enough simulation many mobile communications, satellite TV's complex signal. In several kind of random profile generators, the production figure oscilloscope's instrument company supplies the random profile generator generally, like Anjielun, strength branch, peaceful gram company, also has only produces the random profile generator the company, like Lei Ke, Stan Peking Syndicate. The instrument has table model, PC machine hypothesized, VXI main line, the PXI main line and so on many kinds of ways, the majority of products only then 1 group output, some reach as high as 16 groups outputs. Instrument sampling rate from lowest 100KS/s to 4GS/s, quite real-time band width 50kHz to highest 2GHz. Has the random profile method mainly to have two kinds: Namely the memory and the direct digital synthesis (DDS), the former electric circuit is quite simple, divides two forms: Phase accumulator type and counter type, but needs the deep storage capacity. Instrument's vertical resolution has 8 to 16, the sampling rate is higher when the resolution is lower, is mainly counted/the mold switch and the memory characteristic influence. The storage capacity from smallest 8K (12) to 16M (8), usually may act according to the user request expansion

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