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Simulators >> Circuit Simulators >> convolution of two time functions in Pspice
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Message started by abhay on Feb 18^th, 2003, 1:10pm

Title: convolution of two time functions in Pspice
Post by abhay on Feb 18^th, 2003, 1:10pm

Hi Experts,

Is there a way to convolute two time functions in PSpice? I think we can use the ABM functions in PSpice but could not come up with a suitable implementation.

thanks
-abhay

Title: Re: convolution of two time functions in Pspice
Post by Eugene on Feb 18^th, 2003, 7:05pm

If you have access to VerilogA I believe you can convolve two time functions using a pwl source and a z-domain filter. The pwl source pulls in one time function and drives the z-domain filter. The z-domain filter is an FIR filter with the taps equal to the time-domain samples of the second time function. The only thing not ideal about this approach is the first order hold introduced by the pwl source but if the sampling rate is high enough that should be irrelevant.

If you do not have access to z-domain block, I guess you could fit a filter to the Fourier transform of second time function and replace the z-domain block with that filter.