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Basic Electronics part 4: Operational Amplifier

Basic Electronics part 4: Operational Amplifier. Prof . Yasser Mostafa Kadah – www.k-space.org. Recommended Reference. Medical Instrumentation Application and Design , 4 th ed., John G. Webster (ed.). Ideal Op Amp Characteristics. Voltage Follower. Inverting Amplifier. Summing Amplifier.

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Basic Electronics part 4: Operational Amplifier

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  1. Basic Electronics part 4: Operational Amplifier Prof. Yasser Mostafa Kadah – www.k-space.org

  2. Recommended Reference • Medical Instrumentation Application and Design, 4th ed., John G. Webster (ed.)

  3. Ideal Op Amp Characteristics

  4. Voltage Follower

  5. Inverting Amplifier

  6. Summing Amplifier

  7. Noninverting Amplifier

  8. Differential Amplifier • Disadvantage: Low input impedance

  9. Instrumentation Amplifier • Advantage: High input impedance .

  10. Comparator • Simple • R3=0 • when • when • With hysteresis • R3>0 – controls width of hysteresis • Noise immunity

  11. Logarithmic Amplifier • Output proportional to input logarithm

  12. Integrator

  13. Differentiator

  14. Active Filters • Low-pass filter • High-pass filter • Band-pass filter • Combination of the two

  15. Practical Characteristics of Op Amps • Gain-Bandwidth Product • Constant for any Op Amp • Slew Rate • Offset voltage • Drift • Noise

  16. Example: 741 Op Amp

  17. Example: LH6702 Wideband Op Amp

  18. Assignments • Download 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.

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