EEVblog 1771 - A Tricky OpAmp Exam Question

Dave answers an exam question on OpAmps that's interestingly tricky. Bonus opamp tutorial on biasing.Part 2: https://www.youtube.com/watch?v=33rS0oLULqwhttps://www.eevblog.com/forum/beginners/how-to-analyze-the-opamp-circuit/OpAmp playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHu2FviAaZaiyXwN41G4b1Lf00:00 - A tricky exam question01:45 - What's missing?03:11 - The two most important Opamp rules04:44 - THINK about what sort of exam you are in BEFORE answering the question07:04 - Capacitive reactance "AC resistance"08:53 - They want you to use frequency, but also IGNORE it? How does that work?10:21 - When it doubt, assume a short circuit10:59 - Solving the first part of the question12:20 - The 2nd rule of AC circuit analysis13:33 - Solving the second part of the question, what is the AC gain?15:29 - There is no need to muck around, move on to the next question15:58 - Let's talk about Opamp Biasing22:59 - Single pole high pass filter23:31 - Ripple removal filter26:24 - Conclusion, why is this question is clever?Web Site: http://www.eevblog.comHardware Store: https://eevblog.store/Merch Store: https://eevblog.dashery.com/If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblogOther channels:EEVblog2: http://www.youtube.com/EEVblog2EEVdiscover: https://www.youtube.com/eevdiscover#ElectronicsCreators #OpAmp...https://www.youtube.com/watch?v=nDEGqme5Z4g