Ideal vs. Nonideal Op Amps

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Ideal Nonideal
Infinite input impedance Input impedance of about 1M Ω for IC op amps; as much as 10 12Ω for op amps with field effect transistor
Infinite open-loop gain for the differential signal Open-loop gain typically between 104and 106
Zero output impedance Output impedance typically between 1 and 100 Ω
Infinite bandwidth Bandwidth typically limited by the designer to avoid oscillation


Electronics, Second Edition. Allan R. Hambley.

Chapter 1 - Greg Fong


Christopher Garrison Lau I