Finally i registered on this forum!
Bonjour,
i'm nerd, a passionate student of ee and i quit job two months ago to close my self in my bedroom/lab trying to make something beautiful. (I know it sound a bit crazy but it's true and i'm start to think that maybe i've made a mistake

)
I spent some money on RS, Mouser, TME, Amazon and eBay to get parts and tools that i needed for this specific project.
I hate transitors, i think that i've never understand 100% how they work. I mean i can use them for simple task, sometimes they are essential. But generally speaking if i can choose between two different design and one involves transistors the other no, i choose the second one. Even if that choice change radically the design i.e introducing an ADC, i'm ok with that, i mean it's my comfort zone.
First of all no beta matching problems and no need of temperature compensation.
Well but that isn't the biggest problem by my point of view...i mean, for example, it's about two week that i try to use the Ebers-Moll equation to get, with good approximation, an exponential response of the collector current Ic by varying the Vbe in certain circumstances. It's easier to me to get an exponential response of the Ib (i use only one transistor, regardless of temperature).
Sometimes it work, sometimes don't (even on Multisim or LTspice). I can't write a standard project method. Seems that to achive a good design with transistors you have to try all possible combinations and finally get a special secret formula and it look like a Chili recipe.
What do you think about it?
cheers

some links:
https://schmitzbits.de/expo_tutorial/index.htmlhttps://www.allaboutcircuits.com/projects/diy-synth-series-vco/https://northcoastsynthesis.com/news/exponential-converters-and-how-they-work/https://xonik.github.io/theory/vco/expo_converter_1.html