该数字式相位测量仪以单片机 (89c52) 为核心 , 通过高速计数器 CD4040 为计数器计算脉冲个数从 , 而达到计算相位的要求 , 通过 8279 驱动数码管显示正弦波的频率，不采用一般的模拟的振动器产生 , 而是采用单片机产生 , 从而实现了产生到显示的数字化 . 具有产生的频率精确 , 稳定的特点 . 相移部分采用一般的 RC 移相电路 , 节省了成本。-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.