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Complex filter : Image Reject Ratio (IRR) calculation

lahsivece

Hi ,

How do I simulate IRR of complex filter.  ? ( A transient simulation of an IQ mixer followed by a complex filter and then look at dft of the output waveforms is one way ) 

Is there a cadence documentation for the same ?

 

Thanks,

Regards,

Vishal

 

  • Vishal,

    I think I would probably do this with pss+pxf (or hb+hbnoise with "Do noise" turned off). The pss would be used to analyse a period of the LO frequency of the mixer, and then you'd run the pxf specifying the output and output frequency, and you could plot the two input sidebands - the desired as well as the image - and the IRR would be the ratio of the two. That would be quite efficient to simulate.

    Regards,

    Andrew.

  • Thanks Andrew ,

    A pss+pac analysis also gives the similar results . 

     

    Regards,

    Vishal

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