Buffer Gain

Thread Starter

magnet

Joined Apr 25, 2005
16
I need to find the equation for Vo/Vi of this circuit. I have two filter circuits interconnected via a buffer amplifier, firstly the High-Pass filter has values of 5uf and 800ohms, secondly the Low-Pass filter has values of 5uf and 80ohms. In addition the gain of the buffer amplifier is 1.

Any help would be great thanks
 

hgmjr

Joined Jan 28, 2005
9,029
Originally posted by magnet@Oct 9 2005, 05:52 PM
I need to find the equation for Vo/Vi of this circuit. I have two filter circuits interconnected via a buffer amplifier, firstly the High-Pass filter has values of 5uf and 800ohms, secondly the Low-Pass filter has values of 5uf and 80ohms. In addition the gain of the buffer amplifier is 1.

Any help would be great thanks
[post=10897]Quoted post[/post]​
Hi magnet,

The existence of the unity gain buffer in between the two passive filters makes the calculation of the overall transfer function very straightforward.

If you take the transfer function for the high-pass filter and multiply it times the transfer function for the low-pass filter, you will obtain the transfer function for the overall circuit.

hgmr
 
Top