Signals and Systems Chapter 0

Prof. Yasser Mostafa Kadah www.k-space.orgBasic Electronics

part 4: Operational Amplifier

Recommended ReferenceMedical Instrumentation Application and Design, 4th ed., John G. Webster (ed.)

Ideal Op Amp Characteristics

Voltage Follower

Inverting Amplifier

Summing Amplifier

Noninverting Amplifier

Differential AmplifierDisadvantage: Low input impedance

Instrumentation AmplifierAdvantage: High input impedance

Comparator

Logarithmic AmplifierOutput proportional to input logarithm

Integrator

Differentiator

Active FiltersLow-pass filter

High-pass filter

Band-pass filterCombination of the two

Practical Characteristics of Op AmpsGain-Bandwidth Product Constant for any Op AmpSlew RateOffset voltageDriftNoise

Example: 741 Op Amp

Example: LH6702 Wideband Op Amp

AssignmentsDownload and go through the data sheets of the practical Op Amps discussed and compare their characteristics.Implement Op Amp circuits of your choice in the lab to test their performance.