Proof that if you dig deep enough, any logic can be made from NAND gates and all electronics is analog. Forgetting that last one can bite you in the real world.
Hey - you've inadvertantly opened the trapdoor to a very specialist area of RF design. Radio hams have, in the last 25-30 years, been designing and building very high spec HF recievers and transcievers using H-mode mixers. There was a lot of buzz about these techniques 20 years ago or more, but due to the fact that DDS methods have taken over as the new wanna-buy kit the very high dynamic range approach that MOSFET and square-drive mixers provide has been bypassed except for those striving for the best possible performance. Some search terms for further research - G3SBI mixer , H-mode mixer , TLT H-mode mixer , IK4AUY mixer , high IP3 RF mixer I ran across this vid searching for "CMOS RF mixer" and ended up watching your whole vid even though I was really looking for a circuit I saw is Radcom magazine in, oh, about 1997 haha
Hi mate Paul from Sydney. I actually used the Cmos inverter as an audio amp (low powered) intercom. I cant remember the output power but it was enough to power a speaker. The feedback resistor on a "digital" gate is a forgotten trick. It forces the gate to its linear area. I think you may get vcc/2....not sure. With a quad inverter chip you could bias them all and put a ferrite ant out front and come up with a basic AM receiver..which part of Aus are you from?
Proof that if you dig deep enough, any logic can be made from NAND gates and all electronics is analog. Forgetting that last one can bite you in the real world.
Hey - you've inadvertantly opened the trapdoor to a very specialist area of RF design. Radio hams have, in the last 25-30 years, been designing and building very high spec HF recievers and transcievers using H-mode mixers.
There was a lot of buzz about these techniques 20 years ago or more, but due to the fact that DDS methods have taken over as the new wanna-buy kit the very high dynamic range approach that MOSFET and square-drive mixers provide has been bypassed except for those striving for the best possible performance.
Some search terms for further research - G3SBI mixer , H-mode mixer , TLT H-mode mixer , IK4AUY mixer , high IP3 RF mixer
I ran across this vid searching for "CMOS RF mixer" and ended up watching your whole vid even though I was really looking for a circuit I saw is Radcom magazine in, oh, about 1997 haha
Hi mate Paul from Sydney. I actually used the Cmos inverter as an audio amp (low powered) intercom. I cant remember the output power but it was enough to power a speaker. The feedback resistor on a "digital" gate is a forgotten trick. It forces the gate to its linear area. I think you may get vcc/2....not sure. With a quad inverter chip you could bias them all and put a ferrite ant out front and come up with a basic AM receiver..which part of Aus are you from?
I’m in Melbourne
Did you test how high in frequency it works ?
Ah, yes, the FAFY method, aka the POOMA method (pulled out of my arse).
In my haste, I mis-spoke. I meant FAFO - fuck around and find out :P
@@superchromat yeah I figured as much :D
@@superchromat Yes but fuck around and find yourself would be a good life coaching acronym!
@@TandaMadison that’s basically my life motto, I just didn’t know it
... you want to build a computer to fly Apollo to the moon? .... you can do it with NAND gates. ;)
You can, but they used NOR gates 😊
@@Penfold42 I had a 50/50 chance to get it right.