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Answer to Question #55989 in Electric Circuits for promise

Question #55989
Which of the following is not a valid parameter value of the ideal Op Amp?
Input impedance = infinity
Gain = 200000
Output impedance = Zero
Bandwidth = infinity
Expert's answer
The IC Op-amp comes so close to ideal performance that it is useful to state the characteristics of an ideal amplifier without regard to what is inside the package.
1. Infinite voltage gain
2. Infinite input impedance
3. Zero output impedance
4. Infinite bandwidth
5. Zero input offset voltage (i.e., exactly zero out if zero in).
These characteristics lead to the golden rules for op-amps.
Answer: Gain = 200000.

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