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FPGA-BASED GRATING SUBDIVISION DEVICE AND METHOD
FPGA-BASED GRATING SUBDIVISION DEVICE AND METHOD
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机译：基于FPGA的光栅细分装置和方法
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摘要
Disclosed are an FPGA-based grating subdivision device and method. The device comprises: a differential amplification module (110), a comparison module (120), a logic gate module (130), and a processing module (140), wherein the processing module (140) is an FPGA operation module. Employing only simple peripheral circuits, the differential amplification module (110), comparison module (120) and logic gate module (130), four sinusoidal signals of moiré patterns can be converted into a first digital pulse signal (A3), second digital pulse signal (B3) or third digital pulse signal (C1) identifiable to the FPGA operation module, reducing the demands on additional hardware and saving costs. In addition, the FPGA operation module can realize subdivision, using a target multiplier (a large multiplier), of the first digital pulse signal (A3), second digital pulse signal (B3) or third digital pulse signal (C1), and the FPGA operation module has high primary frequency and strong interference resistance.
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