• Support PF! Buy your school textbooks, materials and every day products Here!

How to calculate gain in a circuit

  • Engineering
  • Thread starter DreamSanchez
  • Start date
  • #1
http://imgur.com/K5nPY

a) Determine the voltage gain of the amplifier, Vout / Vin, in terms of the parameters in the given circuit.

b) Determine the overall voltage gain between the source and the output, Vout / Vsourse, in terms of the parameters in the given circuit.

Attempt at Solution:

I attempted condensing the resistors.
(Ro * Rl) / (Ro + Rl) becomes the new resistor on the right side.
[ (Rb * Rin) / (Rb + Rin) ] + Rs becomes the new resistor on the left side.

After this I am lost. Can anyone help me out here?
 

Answers and Replies

  • #2
gneill
Mentor
20,728
2,721
http://imgur.com/K5nPY

a) Determine the voltage gain of the amplifier, Vout / Vin, in terms of the parameters in the given circuit.

b) Determine the overall voltage gain between the source and the output, Vout / Vsourse, in terms of the parameters in the given circuit.

Attempt at Solution:

I attempted condensing the resistors.
(Ro * Rl) / (Ro + Rl) becomes the new resistor on the right side.
[ (Rb * Rin) / (Rb + Rin) ] + Rs becomes the new resistor on the left side.

After this I am lost. Can anyone help me out here?
Hi DreamSanchez, Welcome to Physics Forums.

For part (a), since you are to assume that Vin is a given, then surely you can find an expression for Vout? Looks like a simple voltage divider to me...

For part (b) you do essentially the same thing, only here you need to find Vin first given that Vsource is known.
 

Related Threads for: How to calculate gain in a circuit

Replies
2
Views
1K
  • Last Post
Replies
4
Views
568
Replies
19
Views
3K
Replies
1
Views
4K
Replies
1
Views
714
Replies
16
Views
2K
Replies
33
Views
3K
Top