The only thing i could tell You, is that such a feature is now being realized in frames of CAD system AVOCAD, where You could see simulation resilts while You simulating (simulator AVOSpice+ postprocessor AVOProbe). Also  i know, that thos program package is relatively cheap.

Good luck!
Dina

Radjeep,

  Since you said that you wanted to process signals, here are
several ways to process signals while the simulation is running.

1) Add an element to the circuit to process the signal, for
   example, using a vcvs to create a differential signal from
   two single-ended signals

    for ADE users
2) Just use the ADE marching waveforms and do the processing
   in the waveform calculator. For example, when simulating
   a PLL, use the "freq" function to track whether the PLL locks
   or not.

   for Spectre RF-Simulink users
3) Use co-simulation and do the processing in Simulink

                                                           Best Regards,

                                                               Sheldon