combine Bode-plots in Multisim

C

case-sensitive

Member

• May 12, 2015

• #1

Hello,

I simulated some Bode-plots for crossovers (high/low pass) in Multisim and it went ok for bandpass, low- and highpass.
Can I simulate, what happened, if I joined the Bode-plots. I.e. I have the low end, mid range and high end for some speakers. Now I would to overlay them, because I am aiming for 1 or so dB rise, where the mid is taking over. Its not exactly linear, so I try to lift the ends a bit.

Cheers,

Case

 

Tony Stewart

Well-Known Member

Most Helpful Member

• May 14, 2015

• #2

Linear amp filter response can be added, yes , even if the response is not linear but passive filters may interfere impedance wise on response in parallel.

 

C

case-sensitive

Member

• May 15, 2015

• #3

its an active filter

 

C

case-sensitive

Member

• May 15, 2015

• #4

but the bode plot only has 1 input, so how could I join 3?

 

Tony Stewart

Well-Known Member

Most Helpful Member

• May 15, 2015

• #5

Do you want to split 3 filter stages, then drive each from your single source , rather than cascade and show source impedance.

3 outputs
LPF, HPF and (LPF+HPF)

 

Last edited: May 15, 2015

C

case-sensitive

Member

• May 15, 2015

• #6

something like this

 

C

case-sensitive

Member

• Nov 29, 2016

• #7

seems cannot be done, when the outputs of the 3 filters are connected, the result is more or less a line. Putting small resistors in at the outlet and place bode plotters before each resitor and another one to the sum of the outlets did not help either

 

MikeMl

Well-Known Member

Most Helpful Member

• Nov 29, 2016

• #8

Not sure why you started a new thread when you already had one dealing with this topic?

As I pointed out in the new thread, here, plotting the Bode plot of cascaded filters is the same as multiplying the individual responses, not adding them.