1. CHAPTER 8 Operational Amplifiers (OP-AMP) Introduction to Electronics Ref: Electronic Devices and Circuit Theory Boylestad

2. OP-AMP Common Op-Amp Applications YTU-Dep. Electrical Eng. / Introduction to Electronics 1.Constant-gain amplifier 2.Voltage summing 3.Voltage buffer 4.Controlled sources 5.Instrumentation circuits 6.Active filters

3. OP-AMP Constant Gain Amplifier YTU-Dep. Electrical Eng. / Introduction to Electronics Inverting Amplifier Non-inverting Amplifier

4. OP-AMP Voltage Summing YTU-Dep. Electrical Eng. / Introduction to Electronics

5. OP-AMP Voltage Buffer (Follower) YTU-Dep. Electrical Eng. / Introduction to Electronics

6. OP-AMP Current-Controlled Current Source YTU-Dep. Electrical Eng. / Introduction to Electronics

7. OP-AMP Low-Pass Filter, First-Order YTU-Dep. Electrical Eng. / Introduction to Electronics The upper cutoff frequency and voltage gain are given by:

8. OP-AMP Low-Pass Filter, Second-Order YTU-Dep. Electrical Eng. / Introduction to Electronics The roll-off can be made steeper by adding more RC networks.

9. OP-AMP High-Pass Filter YTU-Dep. Electrical Eng. / Introduction to Electronics The cutoff frequency is determined by:

10. OP-AMP Band-Pass Filter YTU-Dep. Electrical Eng. / Introduction to Electronics There are two cutoff frequencies: upper and lower. They can be calculated using the same low-pass cutoff and high-pass cutoff frequency formulas in the appropriate sections.

11. YTU-Dep. Electrical Eng. / Introduction to Electronics OP-AMP Question-1 R 1 : 2.2 kΩ R f : 220 kΩ V s : 100 Sinwt (mV) V cc : ±12V

12. YTU-Dep. Electrical Eng. / Introduction to Electronics OP-AMP Question-1

13. YTU-Dep. Electrical Eng. / Introduction to Electronics OP-AMP Question-2 R 1 : 2.2 kΩ R f : 220 kΩ V s : 100 Sinwt (mV) V cc : ±9V

14. YTU-Dep. Electrical Eng. / Introduction to Electronics OP-AMP Question-2

15. YTU-Dep. Electrical Eng. / Introduction to Electronics OP-AMP Question-3 R 1 : 33 kΩ R 2 : 22 kΩ R 3 : 12 kΩ R f : 330 kΩ V 1 : +0.2 (V) V 2 : -0.5 (V) V 3 : +0.8 (V) V cc : ±15V

16. YTU-Dep. Electrical Eng. / Introduction to Electronics OP-AMP Question-3