This was EPIC. I was looking for so long how the demodulation actually works, rather than the explanation that it is ‘passed through a demodulator’ (DUHhh BUT HOW LOL) finally, you did it my friend
Me too!!! But... At @2:15, it glosses over how the carrier is filtered out. I'm trying to figure out how when the carrier is filtered out the audio remains. How is that audio signal captured? I understand how a high or low or band pass filter works, but what I don't understand yet is how the modulation is captured. How is the envelope captured if the carrier is removed? I mean, showing he picture of the envelope remaining after the carrier is removed is super common, all explaintions do that, but HOW is that step achieved? So far everything I look up just shows it similar to this video. They simply remove the image of the carrier, but so far I can't find a video that explains how this is achieved in the circuit. If anyone can explain this I would be very grateful 🙂
No. The carrier frquency is chosen depending on the type of propogation that one wanrs to use. Simplistically, do you want to communicate with somebody close by or far away?
can you clarify if the AM signal is carrying data/audio in Sine Wave when it reaches the detector (diode) and is removing half the signals amplitude isn’t that then loss of data or audio as a consequence? or is the data only actually enveloped in the positive side of the wave….? Or is that in the AM the data is duplicated on both sides of the sine wave?…. Your answer on this would be greatly appreciated?
Essentially the modulated data such as a sine wave or other signal is duplicated on both sides of the carrier - its amplitude is modulated. To recover the modulation, one way is to use a diode to remove half of the waveform. A small capacitor is normally included to remove the last elements of the carrier, but this is not normally an issue. The rectified signal can then be amplified to give the required audio, or other signal. I hope this helps.
When a modulated RF signal is passed into headphones the alternating nature of the RF signal itself which has a much higher frequency that we can hear of the headphones can respond to means that nothing is heard. Rectifying it and then removing the RF reconstitutes the original modulating signal. Single sideband trows away sections of the RF spectrum of the signal. Envelop detecting extracts the original audio, even if it doesn't do it efficiently. I hope this helps.
This was EPIC. I was looking for so long how the demodulation actually works, rather than the explanation that it is ‘passed through a demodulator’ (DUHhh BUT HOW LOL) finally, you did it my friend
I am glad you found the video useful.
Me too!!! But... At @2:15, it glosses over how the carrier is filtered out. I'm trying to figure out how when the carrier is filtered out the audio remains. How is that audio signal captured? I understand how a high or low or band pass filter works, but what I don't understand yet is how the modulation is captured. How is the envelope captured if the carrier is removed? I mean, showing he picture of the envelope remaining after the carrier is removed is super common, all explaintions do that, but HOW is that step achieved? So far everything I look up just shows it similar to this video. They simply remove the image of the carrier, but so far I can't find a video that explains how this is achieved in the circuit. If anyone can explain this I would be very grateful 🙂
Concept of demodulation simplified in just two minutes....
knee voltage is different than forward voltage...
good explanation of AM 👍
Thank you sir very nice gide & very nice best information diode detector video..👍
Thank you so much for your comment. I am really glad you found the video useful.
is there any criteria for selecting carrier frequency based on modulating frequency
No. The carrier frquency is chosen depending on the type of propogation that one wanrs to use. Simplistically, do you want to communicate with somebody close by or far away?
can you clarify if the AM signal is carrying data/audio in Sine Wave when it reaches the detector (diode) and is removing half the signals amplitude isn’t that then loss of data or audio as a consequence? or is the data only actually enveloped in the positive side of the wave….? Or is that in the AM the data is duplicated on both sides of the sine wave?…. Your answer on this would be greatly appreciated?
Essentially the modulated data such as a sine wave or other signal is duplicated on both sides of the carrier - its amplitude is modulated. To recover the modulation, one way is to use a diode to remove half of the waveform. A small capacitor is normally included to remove the last elements of the carrier, but this is not normally an issue. The rectified signal can then be amplified to give the required audio, or other signal.
I hope this helps.
thanks, excellent work!
Thank you for your comment.
very nice, in our world of dsp, this is now done by mag of iq data or taking hilbert transform of a signal and getting the mag of the signal
Glad you liked ut.
perfectly explained..
Hello, is this the same to Non-coherent receiver? Please answer me, I need it ASAP, thank you so much.
excellent
Have you considered not saying the "nought" (or zero) when saying values floating point numbers like "0.6"? It's really not needed.
thanks
isn't there a resistor used ?
The resistor just represents the output load and its usually a potentiometer which is the volume control.
@@ShaithMaster Hello, is this the same to Non-coherent receiver? Please answer me, I need it ASAP, thank you so much.
@Dan Nguyen Hello, is this the same to Non-coherent receiver? Please answer me, I need it ASAP, thank you so much.
Circuit diagram of RF signal , mixture circuit
You can see more about mixers and their circuits here: www.electronics-notes.com/articles/radio/rf-mixer/rf-mixing-basics.php
thanks sir
I'm glad you found it useful.
This does nothing to explain how one half of the signal can be heard. Why doesn't it sound like SSB, where half the waveform is also thrown away?
When a modulated RF signal is passed into headphones the alternating nature of the RF signal itself which has a much higher frequency that we can hear of the headphones can respond to means that nothing is heard. Rectifying it and then removing the RF reconstitutes the original modulating signal.
Single sideband trows away sections of the RF spectrum of the signal. Envelop detecting extracts the original audio, even if it doesn't do it efficiently.
I hope this helps.
thanks, excellent work!
Thanks for helping comment. Glad you found the video useful.