+ Post New Thread
Results 1 to 4 of 4
  1. #1
    Newbie level 5
    Points: 99, Level: 1

    Join Date
    Feb 2019
    Posts
    10
    Helped
    0 / 0
    Points
    99
    Level
    1

    Modeling 5th order CTSD in VerilogA

    Hello,

    I am trying to model a 5th order CT Sigma delta modulator in VerilogA, Are there any simple way to implement the transfer function that just derived from simulink as a verilogA model?
    I mean H(S) directly as a verilogA model?

    •   AltAdvertisment

        
       

  2. #2
    Advanced Member level 5
    Points: 15,107, Level: 29
    pancho_hideboo's Avatar
    Join Date
    Oct 2006
    Location
    Real Homeless
    Posts
    2,289
    Helped
    625 / 625
    Points
    15,107
    Level
    29

    Re: Modeling 5th order CTSD in VerilogA

    Last edited by pancho_hideboo; 21st April 2019 at 05:09.



    •   AltAdvertisment

        
       

  3. #3
    Newbie level 5
    Points: 99, Level: 1

    Join Date
    Feb 2019
    Posts
    10
    Helped
    0 / 0
    Points
    99
    Level
    1

    Re: Modeling 5th order CTSD in VerilogA

    I am Modeling the 5th order CT SD with feedforward architecture, I couldn't find a similar model in cadence libararies so I implemented my model. However I am not sure how accurate it is

    I used Sum, loopfilter laplace_nd() of the transfer function I got from matlab and then ADC and DAC.
    Click image for larger version. 

Name:	xcc.PNG 
Views:	2 
Size:	78.3 KB 
ID:	152539



    •   AltAdvertisment

        
       

  4. #4
    Advanced Member level 5
    Points: 15,107, Level: 29
    pancho_hideboo's Avatar
    Join Date
    Oct 2006
    Location
    Real Homeless
    Posts
    2,289
    Helped
    625 / 625
    Points
    15,107
    Level
    29

    Re: Modeling 5th order CTSD in VerilogA

    Quote Originally Posted by RamyRady_RF View Post
    I couldn't find a similar model in cadence libararies
    It is very natural.

    Quote Originally Posted by RamyRady_RF View Post
    However I am not sure how accurate it is
    Can you understand Delta Sigma ADC surely ?

    Evaluate NTF and SQNR.
    https://www.edaboard.com/showthread.php?380004
    Last edited by pancho_hideboo; 26th April 2019 at 15:22.



--[[ ]]--