Topic 37: Class B and AB Power Amps and Current Mirror Biasing
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- Опубліковано 16 кві 2024
- In this video we derive the equations for gain, input resistance, output resistance, output power and transistor power dissipation for class-B and class-AB biased power amplifiers. The analysis of the basic current mirror is also analyzed.
Very Good！Thanks！
thank you, great content again. I am very happy i came across you somehow on the endless youtube. Also very appreciate the high quality of English language you use on your lectures. it's important for people form non English-speaking world. Thank you for your efforts!
Thank you! I try to be as precise and technically accurate as possible, without being too dry or boring. Not the easiest thing to do sometimes lol. Thanks again 👍🏻
@@Electronics4Guitar i have just received paper version of your lectures. i must say that buying books I have to be sure it will not end up on the shelf covering by dust. It took me a bit time, but yes I have it. That's going to be a good combination to read, listen and watch. I can imagine it takes a lot of time to prepare the content presented on youtube, hopefully you will not get tired 😊. Thank you!
@@robbor2204 thanks! I’m covering a lot more basic circuit theory in the videos. The publisher didn’t want the book to be over 1000 pages or I would have done that. I’ll get to all the topics in the book here, eventually 👍🏻
Excellent video! An entire semester of Electronic Engineering summarized! - key - Q Point, biasing, Class A, Class B, AB amps, Emitter Follower, basic current mirror, Push pull, Importance of C2 - Coupling, energy to Q2 circuit when Q1 is shutoff, Crossover dissipaition, Bipolar supply ..
Thanks. There are a lot of videos on here by people that really understand how this stuff works but not many of them do a very good job of explaining or articulating their thoughts. I try to be precise and efficient with my explanations and work a sufficient number of example problems. 👍🏻
27:34, i made such circuit in simulator a put a static voltage on the input, the reason is to find the max current a particular transistor would give according to it datasheet, witch is 1.5 amps for BD137, BD140, how much watts would the amplifier be rated for if powered from bi-polar 15V transformer, What kind of speaker could i hook up? it's pretty weird since all speakers are either 4 or 8 Ohm's.
Would be cool if you made a video on how to "design" the circuits around the transformer including the capacitors as wel filters to not pollute the grid with noise and stuff, how much capacitance you need, some guy is building amplifiers and uses 66000uF for 150 watts of power and sells these for +50.000€
I’ll get to that eventually.
@@Electronics4Guitar I'm now looking at EMI / EMC filters, but they pretty much always talk about switching power supplies or targeted at that.