Oscilloscope measurements in power electronics: II. Differential probe

[@himanshusemwal]

Outstanding !! I am going through your videos regularly now. These are the real practical problems we face and somehow we know the tricks to avoid them but your in-depth analyasis help us to understand the issues and their solutions clearly. Thanks for sharing your immense experience.

[@sambenyaakov]

Thank for taking the time to comment. Comments like yours keep me going.

[@boonedockjourneyman7979]

Outstanding. Finally a professional level treatment of a critical topic. Mastering pages 21, et seq., is the difference between being a scientist and a slave to some gear company's marketing whank. Most KZbinrs are such slaves. Thank you for your work.

[@sambenyaakov]

Thanks Boonedock for kind word. Keeps me going.

[@a1nelson]

Very, very true. KZbin is completely congested with tutorials on how to blink an LED, thinly veiled marketing materials - with much of the remainder being misinformation. The professor is one of a small number of presenters who are actually interested in teaching matters of substance. I appreciate the time you put into sharing this information with us.

[@falconhawker]

Thank you professor Ben-Yaakov ! It is indeed a pleasure to read (sometimes I must re-read and study ) the professional explanations of switching power supply techniques

[@sambenyaakov]

👍🙏

[@robson6285]

Hey, this is great! This is much more usefull for all kinds of problems but its from a level that there is much to learn for us! Basic things are already teached a lot on youtube but your video's are the next, more interesting level. Great again, but this second highsidescopemeasurementvideo I find even better, more usefull or more complete or, ow just more worth watching than all others i saw. A basic problem but digged deeper so this level stays alone on youtube! And i am glad i once discovered this channel!(i must say again: thanx a lot! And especially thanx for this one!)

[@sambenyaakov]

😊Thanks. Comments like yours keep me going.

[@robson6285]

@@sambenyaakov after making me see through my transformer-issue wich i couldnt understand since my childhood, while some others could only tell me the theoretics without making a réal clear understandable mindpicturebrealtrough, o i mean, after that its clear that you cán réally teach! Great you do it on youtube so me and many others can learn from you. I hope you can teach with these video's, spread the most possible of so much of your usefull knowledge. ( i am dutch so my english could mis the intended meaning)

[@mata7648]

You are someone who knows what you are talking about. It's pretty rare in the youtube now.

[@sambenyaakov]

Thanks for kind words.

[@tamyboy1]

Great video, as always!

[@sambenyaakov]

Thanks

[@hamidk4772]

Simply excellent.

[@sambenyaakov]

Thanks

[@qzorn4440]

wow found out many things with this very interesting information. what kind of hobby differential probe could be designed using the: Vishay IL300 Linear Optocoupler 200kHz bandwidth, 4420VRMS isolation rated voltage , 130dB CMRejection? thank you 😎

[@sambenyaakov]

👍🙏😊

[@bangadu_billa]

Excellent video sir very helpful.

[@sambenyaakov]

Thanks.

[@bangadu_billa]

@@sambenyaakov I do have one request, could you please consider converting you many non english video to english or help provide english subtitles? I tried to understand your point by reading text and materials on slides. However I might be missing some important point as i am not able to understand the langague.

[@sambenyaakov]

This will be very difficult. I hope to eventually cover all in English version.

[@bangadu_billa]

@@sambenyaakov Thank you sir ! Appreciate your efforts 😊

[@ummeylabibahaque5881]

hi, i really liked your video and i was wondering if i could use the circuit on buffer #2 as a differential voltage probe that would input voltage upto 250V from a full bridge rectifier and output 3.3v to a microcontroller?

[@sambenyaakov]

Please indicated to what minute in video you are referring to.

[@vasiliy5578]

Hello, Professor! Thank you for covering such an important topic! I want to ask a question about capacitors, which are in parallel R11,R12,R13,R14 (5:45). First time I have thought that C||R12 and C||R14 are parasitic capacitance and C||R13, C||R11 is placed there just to compensate for it. Just like in 10:1 probe in Pt.1 of your presentation. But then in a few real designs I saw all of these capacitors C||R11,12,13,14 are physically present (real capacitors). So question is follow: why do they need to put an extra capacitors at C||R12 and C||R14 if there is parasitic capacitance there anyway. Isn't enough just to put variable C||R13, C||R11 to compensate for parasitics and do not place real capacitors at C||R12 and C||R14? My guess is that they place real capacitors at C||R12 and C||R14 just to make parasitic capacitance more predictable (if Creal||R12>>Cparasitic||R12) so it should be easier to compensate for it. Thank you!

[@sambenyaakov]

This a generic schematic schematics representing bot the parasitic and compensating caps.

[@UpcycleElectronics]

Thanks for another great upload and explanation. Is there a specific datasheet or application note you are aware of that is used to teach students differential amplifiers in general within a university lab setting? I'm not looking to make a HV probe or anything. I'm just looking to test some of these concepts in a controlled setting. I have a few of TI's INA106 (differential amp with a built in resistor network gain of 10). That datasheet has several examples that could work here, but that entire datasheet is short at 6 pages. It was also first copyright in 1987 so it is as old as me. Is there a better reference you are aware of that I should look for? Thanks again for the upload. -Jake

[@sambenyaakov]

Hi, here are application notes on the web that discuss differential amplifier.

Great video and for free.

[@sambenyaakov]

Thanks😊