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Calculate phase difference between two sine waves on FPGA

I have a problem to calculate phase difference between two sine waves on FPGA. Can anyone help please? Theoretically I could use the equation:
phase difference = arc cos (x1.x2/|x1||x2|), where x1 and x2 are the sine waves.
However I am looking for a practical solution that can be calculated on FPGA. Any bright idea please? Or how to implement the theoretical solution on FPGA? Thanks.


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Syed Zain Nasir

I am Syed Zain Nasir, the founder of <a href=https://www.TheEngineeringProjects.com/>The Engineering Projects</a> (TEP). I am a programmer since 2009 before that I just search things, make small projects and now I am sharing my knowledge through this platform.I also work as a freelancer and did many projects related to programming and electrical circuitry. <a href=https://plus.google.com/+SyedZainNasir/>My Google Profile+</a>

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Syed Zain Nasir
2 days ago