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5th ct sdm design use resonator structure

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david90542

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hi:all,
now i want to restruct one paper used in 5th ctsdm with single OPamp Resonator structure
he has show the STF&NTF
1111.png
so i can struct matlab simulink like
2222.png
because it used Resonator
so for the stability
we need to put the zero before pole right?
but the NTF is 1/(1+H)
the resonator's pole is NTF's zero...
and the NTF's pole is needed to out of BW... is about resonator's zero
however is too small that i can't put out of BW....
or
can i put one NTF's pole between the zeros ?
is there didn't mean a 5th order?
or there are something i can do ?
because the paper can do,
how can't i XD
 

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