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equalizer / pspice simulation

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abbey

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i am trying to study the frequency response of the parametric equalizer that is attached.I tried to do the simulation using pspice but i don't know if there is something wrong with my project . (that is also attached).Can anyone help me?
 

abbey said:
i am trying to study the frequency response of the parametric equalizer that is attached.I tried to do the simulation using pspice but i don't know if there is something wrong with my project . (that is also attached).Can anyone help me?
Click to expand...

What is actually wrong with the simulation?

Keith.
 

abbey said:
... (that is also attached).Can anyone help me?
Click to expand...
  • extraction of only 100ppm from the total voltage will not show a considerable effect - but may be this is intended for the first trial only
  • the 2 series resistors between R28 and GND, as well as R35 seem to be 1Ω instead of 1MΩ
  • There seems to exist a short-circuit between the inputs of the bottom right LM741
 

The 1ohm resistors make sense to me, but the short on the 741 inputs could be a problem.

Keith
 

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