The Signal Path
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The Signal Path
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The Signal Path (TSP) is a science & electrical engineering video blog for industry professionals, researchers, students and hobbyists. TSP is a not-for-profit website dedicated to provide free education spanning a wide range of electrical engineering & science topics. Equipment reviews, tutorials and repair videos are posted regularly.

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Channel Comments
TheSignalPath (4 minutes ago)
Please note that in the schematic diagram the diode D1 is backwards! In the measured circuit the diode is placed correctly which is why the measurement results are correct.
WhiskeyRichard. (10 minutes ago)
You have no idea how long I've been looking for some kind of tutorial on amplifiers that doesn't just mathematically develop the small signal model. Thank you kindly, and to boot, it's super straightforward and clearly explained.
graemelaubach3106 (17 minutes ago)
You are a better teacher than all of my profs combined, you make concepts so easy to understand and more importantly you make it fun because you're just an awesome dude. I wish you the best in these trying times.
TheSignalPath (28 minutes ago)
This is a conceptual schematic diagram. Both diodes D1 and D2 require a bias current to maintain their junction voltage. But, perhaps more importantly for you to consider, my channel has received about 1300 comments so far. You are the first to use obscene language. My channel is a place to exchange information politely and I would like to keep it that way.
sudharsansuresh170 (32 minutes ago)
The way you taught this is just very simple and straight forward, I am mech engineer looking to build my own class ab amp for gaming in my home! Learnt many things, Ty!
peep39 (47 minutes ago)
Excellent resource for someone graduating from class A understanding into class B (like me). Thanks for posting this
MBAgeeJr68 (52 minutes ago)
Thank you for this clear tutorial and refresher for me. I am jealous of your collection of test equipment!
wombatau (1 hour ago)
That was the best and clearest explanation of class B amplification I have ever seen
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