kasra said:
I don't know that it's so much about two different methods.
A realworld transformer has parasitic inductance, capacitcance and resistance that combine to give the trnasformer a high frequency resonance which can result in response peaking and ringing in the time domain.
For a given transformer there will be a resistive load value that will result in a well-damped high frequency resonance without peaking or ringing. However since transformers reflect the secondary load to the primary, that resistive load may not be ideal in terms of what's driving the transformer's primary.
You may want the driving component to see a much higher impedance. However if you keep the load resistive and inrease its value, then you're going to start running into problems with high frequency resonance.
So usually what's done is the resistive load is increased in order to get the primary impedance in the passband that you want and an RC network is then paralleled with it in order to provide proper damping of the high frequency resonance.
se
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.