Design of Multi-channel Arbitrary Waveform Generator with Precision Phase Control
Journal Title: 河南科技大学学报（自然科学版） - Year 2016, Vol 37, Issue 1
Abstract
Multi-channel arbitrary waveform generator with extensible channel and high precision phase control was designed in order to meet the requirements of multi-channel waveform and phase. Based on the direct digital frequency synthesis technology,multi-channel arbitrary waveform was generated by field-programmable gate array. The output waveforms of each channel was synchronously sampled through high-speed analog to digital acquisition chip. The phase difference was obtained by using advance risc machines( ARM) to deal with sampling data with the method of discrete Fourier transform. The output phase control word was adjusted with proportional-integral-differential regulator according to the difference,to realize closed-loop and real-time phase compensation. Multiple systems could work in parallel through synchronous clock interface to realize the expansion of output channels. Experimental results show that the phase accuracy of this system reaches± 0. 02°. The range of sine and square waveforms frequency is 1 μHz ~ 10 MHz. Output amplitude range is± 10 V. Multi-system parallel output is obtained.
Authors and Affiliations
Menghui WEI, Qiaoyu XU, Hongmei WANG
Keywords
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- EP ID EP459942
- DOI 10.15926/j.cnki.issn1672-6871.2016.01.009
- Views 109
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