Examples of Negative Feedback Applications: A) Inverting Amplifiers

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Presentation transcript:

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

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

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

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

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

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