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Understanding Darlington transistor circuit characteristics with…

Understanding Darlington transistor circuit characteristics with...



A look into the Darlington transistor circuit and some of its interesting characteristics.

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Tags: transistors

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25 Comments

  1. Date: January 19, 2018 at 01:16
    Author: CoolDudeClem

    I was wondering, (although i guess it will be explained in the next video) … but I noticed that in many circuits that use the the Sziklai pair, there is also often a resistor between Q2's base and emitter. Is that for the same reason as in the Darlington pair?

  2. Date: January 19, 2018 at 02:53
    Author: jp040759

    Interesting analysis of characteristics I was not aware of. Great explanation. THANX. Another reason to use Mosfets for power drivers.

  3. Date: January 19, 2018 at 03:04

    The bit about not being able to saturate explains the poor performance of an inverter circuit I made long ago…

  4. Date: January 19, 2018 at 04:09
    Author: Jason W.

    Excellent video! I look forward to more on this topic in Part 2.

  5. Date: January 19, 2018 at 05:38
    Author: MrBrymstond

    JohnAudioTech+ Do you have any plans for a 2.1 Class D Amp 50+50+100 amps we could do? and what your favorite brand of capacitors and mosfets if money wasn't a issue? Thanks.

  6. Date: January 19, 2018 at 06:29
    Author: Duds

    nice to see I'm not the only geek with an old radio shack electronics kit

  7. Date: January 19, 2018 at 08:43
    Author: Sayantan Maiti

    Nice video sir… Enjoyed the basics a lot… Looking for your 2nd part

  8. Date: January 19, 2018 at 12:06
    Author: PirateKitty

    Question: Why is there a 8K resistor build into to the TIP120 to pull the base of the first transistor low? I understand its there to help switch the transistor off faster, but why 8K?

  9. Date: January 19, 2018 at 16:02
    Author: Michael Katt

    Nice job, you explained it pretty well, but I think if drew the ckt using the Hybrid-pi model and did the pertinent loop equations it might help some of the younger players to really get a better insight on what is really going on here. Just a thought, again excellent job and thanks for sharing.

  10. Date: January 20, 2018 at 08:05
    Author: uK8cvPAq

    Wow, I had no idea you can't saturate a darlingtons main pass transistor!

  11. Date: March 31, 2018 at 07:07
    Author: listerine 2010

    Dear John is there any instrument you have to measure a signal 10 mV with 1% accuracy?10 mV +/- 2% x 5000= 4900 to 5100. So practically 5100 gain and 5000 are not distinguishable .Giving the fact that gain of transistors are among many E current , CE voltage and temperature dependent so you need to add many more error factors too.The result becomes so uncertain that when you drawn yourself in theory of physics you may loose the point.

  12. Date: April 7, 2018 at 17:15
    Author: ned cramdon

    Nice video, I could grasp most of it. How would you rate the uni-t clamp meter by the way?

  13. Date: April 30, 2018 at 23:49

    Really nice tutorial. Is it possible to use a simple circuit like that to amplify a guitar sinal enough to headphone level?

  14. Date: May 8, 2018 at 06:22
    Author: Hazim Safawi

    At last, find the perfect explaination about darlington transistor. Keep up the good work!!

  15. Date: June 1, 2018 at 14:13
    Author: john mores

    I have to get from 5V signal a Electric motor working this Electric motor needs ~12V and 1A .. i have to use BD676/5 Darlington-Transistors … can u help me please? i don't know how big is the reinforcement for the Transistors how can i find that our without to measure .. from datasheet ?

  16. Date: June 12, 2018 at 21:17
    Author: Inquire98

    "Thank You", thank you very much. I thought your presentation was VERY goog. I look forward to hearing more from you

  17. Date: September 7, 2018 at 12:27
    Author: Graham Lappin

    Excellent explanation. I wish all electronics videos were this good.

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