active filter simulation in ADS

[perado]

hi
I designed and simulated an active inductor and now I want to use it at a band-pass filter how I can do it?

 

[LvW]

hi
I designed and simulated an active inductor and now I want to use it at a band-pass filter how I can do it?

Choose a passive RLC structure (L must be grounded) and simply replace L by the active inductor.

---------- Post added at 10:56 ---------- Previous post was at 10:50 ----------

Most simple solution: Series combination of a resistor and a grounded LC parallel resonance circuit.
You can use the low-impedance opamp output as bandpass output.

 

[perado]

thanks LvW

active inductor is a series R-L , then just use a capacitor? but how I use?

 

[LvW]

Normally, an active inductor comprises two opamps in form of a GIC combination.
As far as I understood you, your active circuit (one opamp?) simulates an R-L combination. Right?
To avoid misunderstandings, show your circuit.

 

[perado]

no i dont use opamp, my active inductor is based on grounded active inductor that includes two mosfet transistors in back to back connection

 

[LvW]

Sorry, I could not know.
Do you know the passive equivalent that is "simulated" with your active circuit?
As mentioned before, choose a passive RLC structure and replace the corresponding part by the active unit(s).

 

[perado]

your wel
yes the equivalent passive circuit (consider small signal model of transistor) is a parallel RLC of course L has series resistance

 

[LvW]

As a first attempt you should place a suitable shunt capacitor in parallel to the R-L combination and a use an additional series resistor Rs to connect the signal source.
If the loss resistance of the inductor is relatively small you should get a bandpass response at the node between Rs and the tank circuit.