Operational Amplifier

Abstract

Op amps can be obtained commercially for $0.50 to $3.00 each. This and their versatility are the reasons for their great popularity. As you perform the suggested investigations, be alert to observe and note those cases in which the real op amp fails to match the ideal properties. Try to find the relevant properties in the “spec sheets”, and take note of the “typical applications” section – this is a prime spot for getting circuit ideas or finding out how new devices might be used. Almost all applications of op amps involve negative feedback as indicated in the diagram below: