The digital phase-measuring instrument in order to microcontroller (89c52) as the core, high-speed counter CD4040 as counter to calculate the number of pulses from, to achieve the requirements of the calculation phase, through 8279 driving LED display sine wave frequency, non-use of simulation in general vibrators produce, instead of using SCM generation, in order to achieve the creation to display digital. has produced a frequency accuracy and stability characteristics. phase shift part of the application of the normal RC phase-shift circuit, saving costs.

385925$qwqw12345678$毕业设计各相关文件样本1\毕业设计各相关文件样本\毕业论文样本\低频数字式相位测量仪.doc
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385925$qwqw12345678$毕业设计各相关文件样本1

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