CHAPTER 8 IDEAL OPERATIONAL AMPLIFIER AND OPAMP CIRCUITS
![CHAPTER 8 IDEAL OPERATIONAL AMPLIFIER AND OP-AMP CIRCUITS CHAPTER 8 IDEAL OPERATIONAL AMPLIFIER AND OP-AMP CIRCUITS](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-1.jpg)
![inverting output non-inverting Op-amp circuit symbol • Open loop mode • Vo = Aod inverting output non-inverting Op-amp circuit symbol • Open loop mode • Vo = Aod](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-2.jpg)
![Final Exam SEM II 2012/2013 An ideal op-amp, was measured in a lab experiment Final Exam SEM II 2012/2013 An ideal op-amp, was measured in a lab experiment](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-3.jpg)
![• Op amp can be configured to be used for different type of • Op amp can be configured to be used for different type of](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-4.jpg)
![• Two main characteristics: • We want the open loop gain to be • Two main characteristics: • We want the open loop gain to be](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-5.jpg)
![Inverting Amplifier Op-amp as an inverting amplifier Voltage at node 1 (inverting) = voltage Inverting Amplifier Op-amp as an inverting amplifier Voltage at node 1 (inverting) = voltage](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-6.jpg)
![Exercise 8. 3 Gain = - (R 2 / R 1) = -(150/12) = Exercise 8. 3 Gain = - (R 2 / R 1) = -(150/12) =](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-7.jpg)
![Can the voltage gain be calculated using the same formula? Try and use the Can the voltage gain be calculated using the same formula? Try and use the](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-8.jpg)
![Non - Inverting Amplifier Voltage at node 1 (inverting) = voltage at node 2 Non - Inverting Amplifier Voltage at node 1 (inverting) = voltage at node 2](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-9.jpg)
![Voltage Follower / Buffer Amplifier Vo = Vi Hence, gain = 1 Voltage Follower / Buffer Amplifier Vo = Vi Hence, gain = 1](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-10.jpg)
![Summing Amplifier Similarly, i 1 + i 2 + i 3 – i 4 Summing Amplifier Similarly, i 1 + i 2 + i 3 – i 4](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-11.jpg)
![Solution: output voltage Solution: output voltage](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-12.jpg)
![Other Op-Amp Applications Other Op-Amp Applications](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-13.jpg)
![Integrator Integrator circuit Integrator Integrator circuit](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-14.jpg)
![Differentiator EXAMPLE 8. 4 Differentiator circuit Differentiator EXAMPLE 8. 4 Differentiator circuit](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-15.jpg)
![Calculating Gain and Design Questions NON - INVERTING Calculating Output and Design Questions SUMMING Calculating Gain and Design Questions NON - INVERTING Calculating Output and Design Questions SUMMING](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-16.jpg)
![Calculate the input voltage if the final output, VO is 10. 08 V. Calculate the input voltage if the final output, VO is 10. 08 V.](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-17.jpg)
![](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-18.jpg)
![What is the value of Vin 1 from the figure above? What is the value of Vin 1 from the figure above?](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-19.jpg)
![Calculate the output voltage, VO if V 1 = V 2 = 700 m. Calculate the output voltage, VO if V 1 = V 2 = 700 m.](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-20.jpg)
![](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-21.jpg)
![IDQ IDQ](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-22.jpg)
![Answering the questions • There are 5 questions. Answer all. • Chapter 1 & Answering the questions • There are 5 questions. Answer all. • Chapter 1 &](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-23.jpg)
- Slides: 23
![CHAPTER 8 IDEAL OPERATIONAL AMPLIFIER AND OPAMP CIRCUITS CHAPTER 8 IDEAL OPERATIONAL AMPLIFIER AND OP-AMP CIRCUITS](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-1.jpg)
CHAPTER 8 IDEAL OPERATIONAL AMPLIFIER AND OP-AMP CIRCUITS
![inverting output noninverting Opamp circuit symbol Open loop mode Vo Aod inverting output non-inverting Op-amp circuit symbol • Open loop mode • Vo = Aod](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-2.jpg)
inverting output non-inverting Op-amp circuit symbol • Open loop mode • Vo = Aod ( v 2 – v 1) – Aod is referred to as the open loop gain. – Notice that is v 2 = v 1, the open loop gain equals to
![Final Exam SEM II 20122013 An ideal opamp was measured in a lab experiment Final Exam SEM II 2012/2013 An ideal op-amp, was measured in a lab experiment](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-3.jpg)
Final Exam SEM II 2012/2013 An ideal op-amp, was measured in a lab experiment in open-loop mode. Determine the open loop gain (Aod) and complete the table below which shows the results of the experiment. V 1 (1) -1 m. V -0. 5 V 0. 99 V V 2 (2) +1 m. V V -0. 506 1 V Vo (3) 1 V -3 V 5 V
![Op amp can be configured to be used for different type of • Op amp can be configured to be used for different type of](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-4.jpg)
• Op amp can be configured to be used for different type of circuit applications: – Inverting Amplifier – Non – inverting Amplifier – Summing Amplifier – Integrator – Differentiator
![Two main characteristics We want the open loop gain to be • Two main characteristics: • We want the open loop gain to be](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-5.jpg)
• Two main characteristics: • We want the open loop gain to be equal to which means that v 2 = v 1 0 0 • We also want the input resistance to be equal to , hence there is no current going into the op-amp
![Inverting Amplifier Opamp as an inverting amplifier Voltage at node 1 inverting voltage Inverting Amplifier Op-amp as an inverting amplifier Voltage at node 1 (inverting) = voltage](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-6.jpg)
Inverting Amplifier Op-amp as an inverting amplifier Voltage at node 1 (inverting) = voltage at node 2 (non-inverting ) KCL at node 1: (Vi – 0) / R 1 = (0 – Vo) / R 2 Vi / R 1 = - Vo / R 2 Vo = - R 2 Vi R 1
![Exercise 8 3 Gain R 2 R 1 15012 Exercise 8. 3 Gain = - (R 2 / R 1) = -(150/12) =](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-7.jpg)
Exercise 8. 3 Gain = - (R 2 / R 1) = -(150/12) = -12. 5
![Can the voltage gain be calculated using the same formula Try and use the Can the voltage gain be calculated using the same formula? Try and use the](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-8.jpg)
Can the voltage gain be calculated using the same formula? Try and use the same method in deriving Vo/Vi
![Non Inverting Amplifier Voltage at node 1 inverting voltage at node 2 Non - Inverting Amplifier Voltage at node 1 (inverting) = voltage at node 2](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-9.jpg)
Non - Inverting Amplifier Voltage at node 1 (inverting) = voltage at node 2 (non-inverting ) KCL at node 1: (0– Vi) / R 1 = (Vi – Vo) / R 2 -(Vi / R 1) = (Vi / R 2) – (Vo / R 2) Vo / R 2 = (Vi / R 2) + (Vi / R 1) = Vi 1 + 1 R 2 Vo / Vi = R 2 1 + 1 R 2 R 1 Noninverting amplifier
![Voltage Follower Buffer Amplifier Vo Vi Hence gain 1 Voltage Follower / Buffer Amplifier Vo = Vi Hence, gain = 1](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-10.jpg)
Voltage Follower / Buffer Amplifier Vo = Vi Hence, gain = 1
![Summing Amplifier Similarly i 1 i 2 i 3 i 4 Summing Amplifier Similarly, i 1 + i 2 + i 3 – i 4](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-11.jpg)
Summing Amplifier Similarly, i 1 + i 2 + i 3 – i 4 – 0 = 0 Example 8. 2 Design a summing amplifier as shown in figure to produce a specific output signal, such that vo = 1. 25 – 2. 5 cos t volt. Assume the input signals are v. I 1 = -1. 0 V, v. I 2 = 0. 5 cos t volt. Assume the feedback resistance RF = 10 k
![Solution output voltage Solution: output voltage](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-12.jpg)
Solution: output voltage
![Other OpAmp Applications Other Op-Amp Applications](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-13.jpg)
Other Op-Amp Applications
![Integrator Integrator circuit Integrator Integrator circuit](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-14.jpg)
Integrator Integrator circuit
![Differentiator EXAMPLE 8 4 Differentiator circuit Differentiator EXAMPLE 8. 4 Differentiator circuit](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-15.jpg)
Differentiator EXAMPLE 8. 4 Differentiator circuit
![Calculating Gain and Design Questions NON INVERTING Calculating Output and Design Questions SUMMING Calculating Gain and Design Questions NON - INVERTING Calculating Output and Design Questions SUMMING](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-16.jpg)
Calculating Gain and Design Questions NON - INVERTING Calculating Output and Design Questions SUMMING AMPLIFIER DIFFERENTIATOR AMPLIFIER INTEGRATOR AMPLIFIER
![Calculate the input voltage if the final output VO is 10 08 V Calculate the input voltage if the final output, VO is 10. 08 V.](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-17.jpg)
Calculate the input voltage if the final output, VO is 10. 08 V.
![](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-18.jpg)
![What is the value of Vin 1 from the figure above What is the value of Vin 1 from the figure above?](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-19.jpg)
What is the value of Vin 1 from the figure above?
![Calculate the output voltage VO if V 1 V 2 700 m Calculate the output voltage, VO if V 1 = V 2 = 700 m.](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-20.jpg)
Calculate the output voltage, VO if V 1 = V 2 = 700 m. V
![](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-21.jpg)
![IDQ IDQ](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-22.jpg)
IDQ
![Answering the questions There are 5 questions Answer all Chapter 1 Answering the questions • There are 5 questions. Answer all. • Chapter 1 &](https://slidetodoc.com/presentation_image/3a23ed1e5a411521e8384afb3e219366/image-23.jpg)
Answering the questions • There are 5 questions. Answer all. • Chapter 1 & 2 will not be in the final exam • Organize your thoughts. When it is organized, so will your workflow. – Messy work will make the lecturers feel annoyed as they have to look for your answers – bear in mind that lecturer handling one section = 50 -60 students – each paper has 5 questions – TOTAL – 250 to 300 questions to mark • Don’t leave a question blank – just write down anything you know that might be related • Study smart, pray and tawakal.
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