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# Continuous-time Fourier Transformation

Last post Wed, Oct 21 2009 4:18 PM by Tawna. 2 replies.
 Started by tester 20 Oct 2009 10:54 PM. Topic has 2 replies and 2191 views
• #### Tue, Oct 20 2009 10:54 PM

• tester
• Joined on Fri, Apr 24 2009
• Posts 45
• Points 895
Continuous-time Fourier Transformation
 Dear All,Can anyone show me how to run Continuous-time Fourier Transfromation please? I only find DFT, and it seems for discrete case only. Thanks.
• Post Points: 35
• #### Wed, Oct 21 2009 12:00 PM

Re: Continuous-time Fourier Transformation
 You can use the "fourier" component in analogLib. The works in conjunction with a transient analysis to perform a Fourier analysis (using a Fourier integral) during a spectre simulation.You should be able to find info on this in the documentation for MMSIM; also I believe there is a solution on sourcelink.cadence.com (can't check as I'm on a plane) and also there's a chapter in Ken Kundert's book "The Designer's Guide to SPICE and Spectre" which covers fourier.Regards,Andrew
• Post Points: 5
• #### Wed, Oct 21 2009 4:18 PM

• Tawna
• Joined on Thu, Jul 10 2008
• Snohomish, WA
• Posts 165
• Points 4,605
Re: Continuous-time Fourier Transformation
 Hi Tester,there is a comprehenisve sourcelink.cadence.com solution:Getting accurate results when using the calculator DFT and the Fourier component.http://sourcelink.cadence.com/docs/db/kdb/2006/June/11251190.html This describes how to set up both the DFT and the fourier component, as well as plusses and minuses of both. best regards,Tawna Wilsey Best regards, Tawna Wilsey Staff Support AE, Global Customer Support Cadence Design Systems, Inc.
• Post Points: 5