2.0 Introduction Operational Amplifiers-Op-Amps Early Op-Amps were constructed with vacuum tubes and worked with high voltages. These early devices were used primarily to perform mathematical operations such as addition,subtraction, and differentiation,thus the term operational. In mid-1960's first IC Op Amp was produced.It is quite easy to design circuits using the IC Op Amp due to the fact that IC op amp has characteristics that closely approach the assumed ideal. Today,IC Op Amps are linear IC that use relatively low supply voltages and are reliable and inexpensive.◆In mid-1960’s first IC Op Amp was produced. It is quite easy to design circuits using the IC Op Amp due to the fact that IC op amp has characteristics that closely approach the assumed ideal. 2.0 Introduction ◆Operational Amplifiers - Op-Amps ◆Early Op-Amps were constructed with vacuum tubes and worked with high voltages . ◆These early devices were used primarily to perform mathematical operations such as addition, subtraction, and differentiation, thus the term operational . ◆Today, IC Op Amps are linear IC that use relatively low supply voltages and are reliable and inexpensive