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Output Impedance

Last modified by Microchip on 2023/11/09 08:59

Low output impedance of an op-amp is an important characteristic, making V_OUT independent of the load current drawn from V_DD. However, the precise output impedance of an op-amp is usually not specified.

Feedback decreases op-amp output impedance. Z_IN’ = Z_IN/(1+βA) which makes the op-amp more close to ideal. Recall that the ideal output impedance is zero.

Output Impedance diagram

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Output Impedance

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