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=33rS0oLULqw

https://www.eevblog.com/forum/beginners/how-to-analyze-the-opamp-circuit/

OpAmp playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHu2FviAaZaiyXwN41G4b1Lf

00:00 – A tricky exam question

01:45 – What’s missing?

03:11 – The two most important Opamp rules

04:44 – THINK about what sort of exam you are in BEFORE answering the question

07:04 – 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 circuit

10:59 – Solving the first part of the question