I would never have thought to try this circuit for fear of letting out the transistor's magic smoke.
Cursed circuits #6: reverse avalanche oscillator
21–28 of 28 posts
Re: Cursed circuits #6: reverse avalanche oscillator
#22I would never have thought to try this circuit for fear of letting out the transistor's magic smoke.
But that's the fun part!
Re: Cursed circuits #6: reverse avalanche oscillator
#23Earlier quoted context omitted.
Garbage -> Sedra and Smith particularly - hate it, anything which kicks you in the nuts right up front with Laplace and networks abstractions, anything from Pearson - have never seen a good one. Good -> Razavi (Fundamentals of Microelectronics), Art of Electronics, most Jim Williams stuff (AN's and articles), Bowick RF Circuit design. They're actually useful.
I find Sedra/Smith a terrible introduction, but a good reference. It's nice once you've already built an intuition for how things work to be able to go back & build up the mathematical models, but trying to understand the behavior of circuits from the math first is a bad order.
I don't know, I found Sedra/Smith to be an excellent introduction.
But personally I think the whole Sedra/Smith vs Razavi argument is basically vi vs emacs for EEs.
Re: Cursed circuits #6: reverse avalanche oscillator
#24Earlier quoted context omitted.
> the usual garbage undergrad textbooks Out of interest, please could you give some examples of textbooks you consider garbage, and some you consider not to be (undergrad or otherwise)?
Garbage -> Sedra and Smith particularly - hate it, anything which kicks you in the nuts right up front with Laplace and networks abstractions, anything from Pearson - have never seen a good one. Good -> Razavi (Fundamentals of Microelectronics), Art of Electronics, most Jim Williams stuff (AN's and articles), Bowick RF Circuit design. They're actually useful.
> Art of Electronics
I would never recommend AoE to pretty much anybody nowadays. The problem is that AoE happily presents circuits you should almost never use right next to circuits you should almost always use with no indications distinguishing the two.
Re: Cursed circuits #6: reverse avalanche oscillator
#25You can even use it to make a simple audio synth: https://www.lookmumnocomputer.com/simplest-oscillator
This is amazing. Now I'm even more upset he scored so low on Eurovision.
His music isn't for everyone, it was sort of inevitable. I love it though, I've got most of his discography downloaded haha
Re: Cursed circuits #6: reverse avalanche oscillator
#26> "It’s hard to build an oscillator"
I would beg to differ. It's hard to not build an oscillator. An awful lot of digital design is avoiding building oscillators all over the place.
Incidentally, the coolest anti-oscillator I've seen used the back EMF from a relay to push a transistor past its breakdown voltage, and that was the oscillating element.
Re: Cursed circuits #6: reverse avalanche oscillator
#27Re: Cursed circuits #6: reverse avalanche oscillator
#28https://en.wikipedia.org/wiki/Pearson%E2%80%93Anson_effect
This is it. Exhibiting of negative resistance.