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- čas přidán 7. 11. 2013
- This is a basic tutorial on PIN Diodes, with some examples of how they are used in RF switch applications. I previously published a video that introduced the topic of how diodes can be used as switches:
• #82: How to use a Diod...
This video takes this a step further, discussing the unique characteristics of PIN diodes and how these characteristics are used for switching large RF signals. The unique ability to have the resistance of the diode be adjusted by changing the bias current can be used for other applications such as variable attenuators, modulators, phase shifters, etc.
In the video I state that PIN diodes aren't suitable for fast switches. What I should have said is that PIN diodes aren't suitable in applications that require fast turn-off characteristics when reversed biased - such as rectifier, detector or mixer applications. PIN diodes do make excellent fast (relatively speaking) RF switches.
Here's a followup video showing some 3rd order IMD measurements vs. bias:
• #130: PIN Diode 3rd or...
The Yaesu FT-7800 Repair Log videos that inspired this tutorial:
Part 1: • #116: Repair Log, Part...
Part 2: • #117: Repair Log, Part...
A copy of the notes in this video can be found here:
www.qsl.net/w/w2aew//youtube/B... - Věda a technologie
You are simply GREAT: a GREAT teacher in a GREAT lab. TNX!
Aged 15 or 16, I designed PiN diode-switching into a Plessey SL600-series IC based HF transceiver which worked essentially, and ended up being very similar to a renowned G3TSO design, though I never understood the 'charge-carrier-bucket' you describe so clearly.
Excellent series of videos and amazed you take the time to build the jigs. I have subscribed.
You know sometimes you just find the right video, made by the right person, and everything just goes up to an other level, that's what I have experienced several times on your channel, including this video! :-)
I don't know how you do it, but you put so much useful information in such a short and understandable video. Thank you!
Intersting; Finally understand what a PIN diode is used for !
This is how you understand electronics. This stuff is worth hours of meticulous reading from books. Thank you!
I watched this again and learned even more. Thank you.
Very informative video. I used this technique in my patented TV Pedaler® product but I never fully understood how it worked until I saw your "bucket of charge" explanation. Thank you!
You have helped fill so many gaps in my knowledge from things I never learn't properly at college. The five year one day a week City and guilds course my company sent me on was still teaching valve theory alongside transistors in the late 70's.
As a home project, I once built the 1/4 wave line PIN switch into a 2 meter transceiver, to switch between transmit and receive without an aerial change-over relay, but never understood how it worked until now. From memory mine consisted of at least two 1/4 wave lines and at least four PIN diodes, but memory is a bit hazy now.
Thank you for these wonderfully explained videos. For me the electronics hobby had died about 15 years ago when computers started to do everything far better than things I could build and hence little point building things any more, but your videos have reignited my interest. Thanks again.
Howard UK
Hi Alan, another great education piece, I always learn something new when I watch your tutorials - thank you.
I really enjoy your presentations on RF applications. Fantastic explanation. I love watching your practical experiments. Thank you.
Thanks you so much for all this very high quality content, you are the one with a clear signal and low noise. Thanks again.
Thank you for the excellent lecture. You have a talent for explaining circuity.
A great explanation of the PIN diode. Thank you so much!
Better than great!, you do have the skills to transmit your knowledge, that's so dificult for so many teachers, thank you!
Such a helpful video, thank you for explaining the quarter wavelength property. Little tidbits of knowledge like that help a lot in understanding the full circuit
Very interesting tutorials, now i love more and more your vids, especially RF stuffs.
Thx Alan
Another brilliant explanation of something I haven't previously understood properly. I've now got a backlog of projects to try these circuits myself!
Simple and practical explanation, hard to find in literature. Thanks a lot Alan !
All very clever. This is a completely different area of electronics to that which I'm familiar with. And so well taught too.
As a former teacher, I recognize your excellence! Thanks.
The oscilloscope displays of the phenomena being discussed are very helpful. Many thanks for taking the time and trouble to prepare and post these videos.
I had never heard of a pin diode but you answered all the questions I had about it. Well done video.
Another great video and this time RF. Started out my career in consumer electronics with the old vacuum tube superheterodyne radio receiver with the old air tuning capacitor and the local oscillator operating with an IF frequency of 455KHz. Old monochrome black and white receivers which every home had supported by four legs etc.. While serving in the United States Air Force back in the late 70’s and 80’ s maintaining and servicing Radar transmitters and receivers enhanced my experience with RF however I had never heard of pin diodes. Excellent job in explaining the theory and practical applications as well as visual aid of an actual circuit of how pin diodes are used in in the isolation of a transmitter and receiver circuit.
thank you for contributing to everyone out there Alan , Regards from VK3
That was an amazing tutorial about PIN Diodes - I love the application of high power high frequency switching applications.
Excellent! Believe me, as I have > decade of teaching experience, you are just great!
I never thought much about the TR switch as explained in the video.. really nice video, thanks for sharing all these insights.
Fantastic tutorial on PIN diode! I don't do a lot of RF but when I see a PIN diode I'll definitely have a much better idea of what it's doing there.
Excellent tutorial on PIN diodes. you're so good at explaining. THANK YOU.
Wow. I really enjoy and learn from your teaçhing. We're house electronics teacher before. I haven't seen a teacher demonstrate theory and show the test like you do.I once had a excellent teacher back in high school who thought me well but you are awesome. Keep up the excellent job. You have a teaching gift. I am getting baçk into electronics. Your teaçhing really helps. God bless you buddy.
Thank you - I am glad you enjoy my videos!
I've used TX/RX PIN diode RF switches in the past, but never really understood how they worked. Thanks for a great video.
I was looking for a good explanation of how pin diodes are used as switches and this helped allot. thank you
Excellent tutorial! I have advised my Uni students to view it.
Great video Alan. I wasn't aware of these diodes and didn't know about the 1/4 wavelength property of inverse impedance, ingenious way to chose between Tx and Rx using minimal components.
Thanks. Enjoyed the video very much. My goal was to learn how PIN Diodes work and you made it quick and simple. Good show.
Your videos are very well presented and are informative. You make an excellent teacher.Great job, Thanks for your presentations.
Excellent video. I’ve come to love my Elecraft rigs and the quiet nature of my HR 50 ATU with the QSK board, but I never really understood how PIN diodes worked and certainly not how they worked in place of relays (such as the noisy ones in my IC 7300). I understand the mechanical nature of the the relays, but never understood the complexity of the PIN diodes. Now I know, thanks for yet another awesome video. De W1ND.
Thanks for explaining a pin diode ,I have known of them for years but never used one and have an idea or two or recurring ideas over time.
Best tutorial on pin diodes ever!
Thanks a lot! 🙂🙋♂️🇧🇷
Thanks w2aew any time to want to learn something I will choose you're videos....
w2aew you are great in explaining the PIN diode with practical demo. I was searching for this type of video to get a full knowledge on PIN diodes. You could have informed some of the technical names of PIN diodes readily available in the market. Many thanks.
Thanks Alan. That's interesting. All the times I bought all kinds of diodes, I don't remember ever seeing any PIN Diodes.
Just the explanation I was looking for. To bad you didn't include the attenuator construction itself yet but I guess that's something I should be able to figure out myself!
Really nice... Well explained with both theory and practical ..Thank you for such a great lesson..
This is an excellent primer on using PIN diodes in RF switching applications!
Wow! Great crystal clear instruction ! Thanks!
Thanks, clear, concise and paced perfectly.
Time to replace my noisy TX relay and filter relays with PIN diodes. Thank you for a great tutorial!
Yet another fantastic video. Awesome explanation!
You are truly awesome educator! Thanks for this great video! I wish you can do a video on antenna switching for direction finding; a feature available in BLE 5.1
Great video (as usual)... Thanks a lot for sharing your knowledge. Eric, France.
Great tutorial Alan as always!
Thanks for the video! I knew about diode switching, but I didn't understand how it could work for large voltages, such as in transmitters or various antenna switchers, not being aware of the "storage bucket/flywheel" characteristics of the PIN diodes. Cool, I have learned something new!
BTW, you have a really excellent drawing style - my computer drawn schematics and diagrams often don't look as good as your hand drawn ones!
Alan: Thank you very much for this video on the PIN diode. Many questions answered!! I never encountered PIN diodes until I built a 40M transceiver which uses them. When I went to trouble shoot the circuit I saw just how far behind I've become in the electronic field! Again, thanks for the tutorial. As usual, one of excellent quality!!
Al - K8AXW
Thank you ! That was excellent. I think I now have at least some understanding of what I am looking at in the front end of my TS-930 schematic. ie. Switching of the bandpass filters. This video 'solved' it for me.
strong in theory, practice and how to present thing simply... really great
Thank you for this. I now know that I understood little about how PIN diodes behave.
This was really helpful Alan. Thank you so much.
Thank you very much for your detailed explanation.
Thanks from India!
Your videos are great!
Very good practical tutorial. thank you
So fun to learn, most important i been thinking long ago that i did well grasp this concept well but actually did not fully understand.So simple to learn when teacher really understand theory and practice.
You should teach university professors as well how to teach.
Definit. would go trough all your videos as i saw few others as well and all are excellent.
Real treasures!
Thank you.
Many thanks for the information. Very clear and concise.
Best video. Thank you. I need to do a presentation on these diodes for school. This really helped.
Glad to help! Let me know how your presentation goes.
Very nice video thanks Alan great production value!
Excellent explanation..very useful...Thanks a lot
Great tutorial! Keep up the good work!
Excellent explanation sir. I have become your fan.
Really good video. I've always been fuzzy about PIN diodes.
Awesome video that i learn something new from. Thanks!
Thanks for the video. Very well explained.
A fantastic video, as always. I feel like i really understand this now! Heading to eBay to grab some cheap PIN diodes and build some circuits to tinker with at 54mhz
Thank you sir, this video helped with my PhD research.
Excellent Demo!
Hi W2AEW , I request you to make a video on RF Tuners which are used to characterize High Frequency & High Power RF Transistors(GaN) , what I meant is load pull analysis(you have already done amazing tutorials on smith charts) , by the way you are one of the best instructors I have ever met in my life
and actually what I observed in you is that the thought what comes in your mind , and what you talk or explain and later what you do on the bench are in unison and here in our culture in india we call that as TRIKARANA SUDHHI which is a rare quality , kudos W2AEW , it is always fun to watch your videos which edify
Regards Bhavani Sankar Appalla
I can add "load pull" to my very long list of future topics. Thank you for your very nice comments!
You sir, are a great teacher!
Very good tutorial on the PIN diodes! I am spending quite a bit more time on CZcams and less on the Boob Tube. Thanks!
Awesome teacher you are.
Great video and great explanation. Never ever used PIN diode.
Very good video, as always!
Great explanation, thanks
Very interesting, I was reading recently about how different I.F filters were switched using diodes in H.F receivers and I was puzzled about how that worked; am I right in supposing they employ a similar principle to what you describe here? Thanks for the informative videos!
I did not know that about PIN diodes ..... very cool. I like the way you teach, just wish my old electronics teachers from the past could have done the same for me. .... I’m a slow learner.
Thanks for this educational video!
Best explanation ever
Very nice and more informative video, Thanks sir ! 😊😊😊
Really appreciate this video and your explanations on this topic. 73s
Thanks for helping me prepare for my job interview!
I hope you get the job!
PIN diodes are interesting devices. Another is an avalanche transistor. I once used the combination of both to create an extremely large and fast current spike. If I recall correctly it created a 60amp spike of a sub nano second length. It would be interesting to imagine a long wire antenna which could be 'tuned' by length with the PIN diodes also.
Muchas Gracias, Is a excellent video.
Wow, excellent! You are a very good speaker, too :-)
Would have been interesting to apply a square wave to the control line of the pin diode to display pulsed transmission of a sinewave. Great range of video's well done. Joe G4PMY
Hi i realy loved your vid of pin diodes thums up! Tnx.
Love your videos!!
This was a fantastic video.. These are amazing little devices.
Thanks a lot for your detail explanation!!1
Excellent video , thanks for share.
Nicely explained.
WOW you just did a great job.