1. Examples of Negative Feedback Applications: A) Inverting Amplifiers
1.Summing Amplifier 2.Differentiator 3.Integrator B) Non Inverting Amplifiers 1. Voltage Follower

2. Summing Amplifier (Adder) : the inputs are added and the sum is inverted . If all resistors are of equal value, then Vo = -(V1 + V2+ V3)
Figure 14 Summing Amplifier V1 VO V2 V3 0V R1 R2 R3 RF

3. Integrator (the input is integrated with respect to time)
Figure 15 Inverting Op-Amp as Integrator R C
VIN VO

4. Differentiator (the input is differentiated with respect to time)
Figure 16 Inverting Op-Amp as Differentiator C R
VIN VO

5. Voltage Follower (Non Inverting)
It is a non inverting amplifier with gain=1
So the output is the same as input.
VIN VO
Figure 17 Voltage Follower