Anti-jitter Frequency Second Harmonic Circuit of Increment Type Photoelectric Encoder Based on FPGA
Xiaoying Bai · Modern Electronics Technique · 2010
According to the characteristics of the increment type photoelectric encoder′s construction,the reasons of the error encoder pulse caused by jitter in the output signals are analyzed,a high-precision anti-jitter second harmonic circuit was designed according to the characteristics that the two output signals(A-phase,B phase) of the encoder can not change at the same time.In this way,the interference pulse signal can be filtered out effectively.