1. The problem statement, all variables and given/known data
Find the input impedance.
2. Relevant equations
3. The attempt at a solution
Input impedance= R1. I don't get why we can ignore the other resistors.
Problem 2 :
1. The problem statement, all variables and given/known data
Find the gain of the system.
2. Relevant equations
3. The attempt at a solution
Gain = 2
My professor wrote
vout= (R3/R2) Vin + vin = 2Vin, so gain =2.
I understand that (R3/R2) Vin is from the output of the op amp but I do not know where the other Vin came from.
Can someone explain this please?
Thank you so much!
Find the input impedance.
2. Relevant equations
3. The attempt at a solution
Input impedance= R1. I don't get why we can ignore the other resistors.
Problem 2 :
1. The problem statement, all variables and given/known data
Find the gain of the system.
2. Relevant equations
3. The attempt at a solution
Gain = 2
My professor wrote
vout= (R3/R2) Vin + vin = 2Vin, so gain =2.
I understand that (R3/R2) Vin is from the output of the op amp but I do not know where the other Vin came from.
Can someone explain this please?
Thank you so much!