transfer functions


by ionlylooklazy
Tags: functions, transfer
ionlylooklazy
ionlylooklazy is offline
#1
Sep7-05, 12:08 PM
P: 30
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?
Attached Thumbnails
untitled.JPG  
Phys.Org News Partner Engineering news on Phys.org
Lifting the brakes on fuel efficiency
PsiKick's batteryless sensors poised for coming 'Internet of things'
Researcher launches successful tech start-up to help the blind
berkeman
berkeman is offline
#2
Sep7-05, 02:44 PM
Mentor
berkeman's Avatar
P: 39,648
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.


Register to reply

Related Discussions
Transfer Functions in MatLab Math & Science Software 9
Transfer functions in op amps Engineering, Comp Sci, & Technology Homework 1
Plotting Transfer Functions Using Matlab Math & Science Software 1
transfer functions Electrical Engineering 1
Transfer Functions Electrical Engineering 1