What is an op-amp
An op amp is a linear devices that makes the volatge difference between two devices bigger
Formula for Output voltage in an ideal op-amp
Vout = AoL (V+ - V- )
What are the properties of Ideal Op-Amp
1) Gain is infinite
2) Input Resistance = Infinite
3) Output resistance = 0
4) V+ = V-
5) No currebt flows into the input
What is the difference between an open and closed loop and what feedback do we find in op-amp
Open loop = no feedback and acts as a comparator
Closed loop = has feedback and acts as an amplifier
Negative feedback loop - takes the output and feeds it back
What is Gain Bandwidth Product ( GBP)
GBP = Gain * Bandwidth
state features of a non-inverting op- am
- Vin is connected to the positive terminal
- Output signal sign is +ve
- Gain = 1 + RF/R1
State the features of an inverting op - amp
- Vin is connected to negative terminal
- Rf and R1 connected to Vn signal
- Gain = - RF/R1
How do we calculate Vin
Vin = Vs * Rin/Rin+Rs
How do we calculate VL
VL = Voc * RL/RL +Rout
