1. The op-amp configuration shown�above is a voltage-follower often used as a buffer amplifier�
Operational Amplifiers Tutorials Series
Op-amp Integrator Network
Op-amp with T-bridge Feedback Network
Instrumentation and Summation Configuration
Linear Op-amp Operation-Inverting And Non-Inverting Configuration
�Since v+ = v- = vIN, and vOUT = v-, we can see by inspection that the closed-loop gain Ao = 1
�We can obtain the same result by writing
vOUT = A (vIN � vOUT) or
vOUT/vIN = A/(1 + A) = 1 for A >> 1�
2. A typical voltage-follower transfer curve is shown below for the case VPOS = +15V and VNEG = -10V�
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Related Tutorials
Operational Amplifiers Tutorials Series
Op-amp Integrator Network
Op-amp with T-bridge Feedback Network
Instrumentation and Summation Configuration
Linear Op-amp Operation-Inverting And Non-Inverting Configuration
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�Output is connected directly to negative input (negative feedback) �Since v+ = v- = vIN, and vOUT = v-, we can see by inspection that the closed-loop gain Ao = 1
�We can obtain the same result by writing
vOUT = A (vIN � vOUT) or
vOUT/vIN = A/(1 + A) = 1 for A >> 1�
2. A typical voltage-follower transfer curve is shown below for the case VPOS = +15V and VNEG = -10V�
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