Elen224 Chapter 1 figs

Alan Robert Clark

December 9, 2005

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Figure 1: Typical Op-Amp symbol


Figure 2: A model of the Ideal Op-Amp


Figure 3: The Inverting configuration


Figure 4: The quest for a Virtual Earth


Figure 5: An Integrator configuration.


Figure 6: The Differentiator Configuration


Figure 7: The Weighted Summer


Figure 8: The non-inverting configuration


Figure 9: Equivalent circuit of the non-inverting Op-Amp


Figure 10: A Unity-gain voltage follower


Figure 11: A Difference Amplifier


Figure 12: Simple Intrumentation Amplifier


Figure 13: A Standard Instrumentation Amplifier


Figure 14: Usual view of Instrumentation Amp


Figure 15: A Model of the Offset voltage problem.


Figure 16: The problem of an offset voltage in closed loop


Figure 17: AC-Coupling the amplifier


Figure 18: Bias currents modelled as current sinks


Figure 19: Bias Currents causing an offset voltage.


Figure 20: The Pinouts for the 741

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