The theory to extract angular error is described and the realization of millimeter radar's digital phase comparator and extracting method of angular error's sign are discussed.
论述了如何利用和差三通道的一维距离像来获取三维图像的实现方法。
The digital comparator designed with FPGA generates several PWM current waveform synchronously, to realize the step angles even division control for four-phase stepping motor.
并通过FPGA设计的数字比较器，同步产生多路PWM电流波形，实现对四相步进电动机转角进行均匀细分控制。
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