Circuit Design of Encoder Signal Processing Based on CPLD
Wu Gang · Yibiao jishu yu chuanganqi · 2012
This paper introduced a method based on CPLD chip of ALTERA company which dealed with the output signal of incremental encoder and achieved filtering,frequency doubling and phase discriminating of the signal.We designed a 4 frequency multiplication pulse output circuit which improved the accuracy of the encoder measurement.The circuit of phase discrimination can accomplish the positive and the negative measurement of angle or speed.This paper also provided the Quartus schematic of block diagram,timing simulation picture,and the results of experimental test.This research can be used to measure angle,displacement and so on,it has wide application value in the measurement field.