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Forum Post: RE: How to design two AFE5809 for realize a doppler measurement with 16 piezo?

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Sam, About the routing constraints: Obviously each diff pair needs to be matched length. But also, all channels need to be matched length up to the common point. With CW doppler the phase is very important, so a little delay could result in lower SNR. Then, the phase between I and Q is also important so these lengths need to match as well. Chuck

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