Quadrature signal generation method based on comparison
Chen Liang-min · Electronic Design Engineering · 2014
To the problem that different applications require different characteristic orthogonal signal problem,this article,using comparative and listed methods and passing through the specific circuit design,production,testing,analysis,comparison,obtained four typical methods that produce orthogonal signal and their respective advantages and shortcomings.Producing orthogonal signal has four kinds of typical designs:Single-chip digital synthesis,FPGA direct digital frequency synthesizer method,DDS chip AD9851 synthesis,RC-CR phase shift network method.This article introduces the specific principles of these methods and makes a detailed comparison in the amplitude adjustment,the range of adjusting frequency,orthogonality and so on to select the appropriate design fitting different designs.