nhkch
Junior Member level 2
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![hbf_pdf.PNG hbf_pdf.PNG](https://www.edaboard.com/data/attachments/31/31044-40390042b11d8dfcccb091af9d4f2e8c.jpg)
I'm trying to design a half band filter for interpolation used in Sigma delta modulator. Current using Matlab delsig toolbox by Richard Schreier..
There is a function designHBF. I try the example given and got the result as stated in the pdf which is the snap shot below. I cant understand how to connect the value obtain with the diagram given. What is the switch at the end of the filter in interpolation structure (out@fs) mean? Anyone can help? thanks