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single or double precision filter

Question asked by fjlasjdfkj322038402 on Jul 7, 2016
Latest reply on Jul 13, 2016 by fjlasjdfkj322038402

Hi,

 

The single precision filter has a ploblem.

Examples are as follows. Here, f = 30Hz, Q = 1.41, Boost = 1dB

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1. The level12 readback data is -48dB.

     I add a DC filter(DCB2), and the level3 read back is -65dB smaller than before. But the problem is still very serious.

    Why?

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2. Problems have improved use the double precision filter. But there is still no complete solution.

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So, I don't dare to use the single precision filter now.

 

 

Thanks,

Anthony

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