Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I...
-
Upload
gianni-nattress -
Category
Documents
-
view
217 -
download
0
Transcript of Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I...
![Page 1: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/1.jpg)
1
Lecture 7:Op Amps Intro &Midterm I ReviewNilsson & Riedel 5.1-5.3
ENG17 (Sec. 2): Circuits I
Spring 2014
April 22, 2014
![Page 2: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/2.jpg)
2
Overview
• Usage• Op Amp Overview• Fundamental
Operation• Basic Op Amp Circuit• Midterm Review
![Page 3: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/3.jpg)
3
Usage: Strain Gauge
• Measure strain by measuring change in resistance
• Problem: hard to measure tiny resistance change
Δ𝑅=2𝑅Δ𝐿𝐿
![Page 4: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/4.jpg)
4
How to Measure
• Measure voltage across Wheatstone bridge
• Voltage still a small quantity• …Use an Op Amp to amplify the voltage!
Op Amp = Operational Amplifier
Indicates potential to perform math operations
Indicates potential to amplify input signals
![Page 5: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/5.jpg)
5
Overview
• Usage• Op Amp Overview• Fundamental
Operation• Basic Op Amp Circuit• Midterm Review
![Page 6: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/6.jpg)
6
Op Amp Terminals
![Page 7: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/7.jpg)
7
Terminal Voltage / Current
Follows the Node-Voltage Setup All currents set up as going into the “black box”
![Page 8: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/8.jpg)
8
Overview
• Usage• Op Amp Overview• Fundamental
Operation• Basic Op Amp Circuit• Midterm Review
![Page 9: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/9.jpg)
9
Voltage Transfer Characteristic
A = gain (multiplying constant)
Use “negative feedback” to stay in linear region
![Page 10: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/10.jpg)
10
Overview
• Usage• Op Amp Overview• Fundamental
Operation• Basic Op Amp Circuit• Midterm Review
![Page 11: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/11.jpg)
11
Op Amp Circuit
![Page 12: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/12.jpg)
12
Overview
• Usage• Op Amp Overview• Fundamental
Operation• Basic Op Amp Circuit• Midterm Review
![Page 13: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/13.jpg)
13
Difficulties
PS. Don’t forget about units!
![Page 14: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/14.jpg)
14
Thevenin / Norton Equivalents
![Page 15: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/15.jpg)
15
Superposition
![Page 16: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/16.jpg)
16
Max Power Transfer
![Page 17: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/17.jpg)
17
Questions?
![Page 18: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/18.jpg)
18
Extra Office Hours
• Tomorrow, Wednesday, 5-7pm• Kemper 3101
![Page 19: Lecture 7: Op Amps Intro & Midterm I Review Nilsson & Riedel 5.1-5.3 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 22, 2014.](https://reader036.fdocuments.us/reader036/viewer/2022062417/551b69bb550346ae7a8b5f44/html5/thumbnails/19.jpg)
19
Recap
• Usage• Op Amp Overview• Fundamental
Operation• Basic Op Amp Circuit• Midterm Review