Transfer functions

Main Question or Discussion Point

i've always been a little confused on transfer functions, could someone offer me some tips/hints please?

if I have this circuit shown,

a transfer function is the ratio of the input to the output?
can it be the ratio of the currents, or must it be the voltages, also, in this circuit, would the input be considered across the capacitor?
 

Attachments

Answers and Replies

berkeman
Mentor
56,114
6,147
The transfer function is generally the ratio of an output divided by an input. You can have Vo/Vi transfer functions (the most often used), but you can also have any mix of Io, Vo divided by Ii or Vi.

In your circuit, Io/Ii, Io/Vi and Vo/Ii would each have some meaning for non-DC input signals. But since Vi = Vo, Vo/Vi == 1.

To calculate each of the transfer functions, just write the KCL or KVL equations for each node and solve for the transfer function ratio of interest.
 

Related Threads for: Transfer functions

  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
7
Views
3K
  • Last Post
Replies
1
Views
8K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
5
Views
12K
Top