great video. But it would have been even greater if you showed the input and output of the amp in your first circuit - i bet you the input is a nice sien wave and the output looks like a square. Not because the amp is shite, but because you need to overdrive it into clipping (saturate the amp) which turns a sine into a square. This not great performance for amplifiers, but is amazing for multipliers - because a square wave has the harmonics we need. Then you just fileter out (as you did) the desired harmonic and you have a multiplier! Keep up the good work, I would love to see more in this series - perhaps making a full fledged transmitter/receiver of these components and characterise its performance, maybe with a discussion of what could be improved. Thanks
I'm not sure you understand the role of the diodes in your first circuit. They aren't 'rectifying' or 'interfacing'. They are converting a sine wave to an approximation of a 1.4 Vp-p square wave. This is because a square wave in the frequency domain consists of the principle and every odd harmonic. Were it not for this clipping action, there would be no 3rd harmonic to be filtered. There are more rigorous explanations that this, but this gets us into the right ballpark.
I didn't know the multipliers were packaged that way. I have to start looking at parts. Thanks for the great video!
Mini-Circuits is a good source. You can also get free samples. RF Man
@@rfmanchannel6915 Thanks I will check that out.
Thank you for another great video.
Perfect for a CB receiver!
great video. But it would have been even greater if you showed the input and output of the amp in your first circuit - i bet you the input is a nice sien wave and the output looks like a square. Not because the amp is shite, but because you need to overdrive it into clipping (saturate the amp) which turns a sine into a square. This not great performance for amplifiers, but is amazing for multipliers - because a square wave has the harmonics we need. Then you just fileter out (as you did) the desired harmonic and you have a multiplier!
Keep up the good work, I would love to see more in this series - perhaps making a full fledged transmitter/receiver of these components and characterise its performance, maybe with a discussion of what could be improved. Thanks
I'm not sure you understand the role of the diodes in your first circuit. They aren't 'rectifying' or 'interfacing'. They are converting a sine wave to an approximation of a 1.4 Vp-p square wave. This is because a square wave in the frequency domain consists of the principle and every odd harmonic. Were it not for this clipping action, there would be no 3rd harmonic to be filtered.
There are more rigorous explanations that this, but this gets us into the right ballpark.
Thanks for clarifying! Regards