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Chapter: Linear Integrated Circuits : Basics of Operational Amplifiers

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Ideal operational Amplifiers

Infinite input resistance Ri, so that almost any signal source can drive it and there is no loading of the proceeding stage.

Ideal operational Amplifiers


Ideal op-amp characteristics:

·           Infinite voltage gain A.

·           Infinite input resistance Ri, so that almost any signal source can drive it and there is no loading of the proceeding stage.

·           Zero output resistance Ro, so that the output can drive an infinite number of other devices.

·           Zero output voltage, when input voltage is zero.

·           Infinite bandwidth, so that any frequency signals from o to ∞ HZ can be amplified with out attenuation.

·           Infinite common mode rejection ratio, so that the output common mode noise voltage is zero.

·           Infinite slew rate, so that output voltage changes occur simultaneously with input voltage changes.

 

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