I see so many misconceptions about BJTs, people seem to either over-complicate the hell out of them, or over-simplify and then wonder why things don't work. I want to find a nice middle point, something overcomplicated that doesn't work. Today's post is to build a simple ground-up understanding of the BJT using fun analogies that … Continue reading WTF is a BJT?
Tag: engineering
ABCs of PCBs
Printed Circuit Boards (PCBs) are the backbone of electronics, the land we build on. To the average person, when you're thinking of circuits, you're thinking of PCBs. The first PCB I professionally designed (well, modified) There's a lot to say about circuit design, layout, signal integrity, safety, manufacturability etc. but I wanna get even more … Continue reading ABCs of PCBs
Misconceptions: small-signal analysis
One of the, if not the biggest hurdles to understanding transistor circuits -- and system modeling -- is small-signal analysis. As with all things, the reason it's difficult to understand is that professors are given very little time to provide context, so it's given or received like scripture on golden tablets in a language you've … Continue reading Misconceptions: small-signal analysis
Why are high impedances nodes slow?
I saw a great question posted the other day, why are high impedance nodes slow? Makes sense why that can be confusing, a transistor looks like a current source, multiply that current by a high impedance that must mean very high gain, why would that not be true at higher frequencies? Why does the resistance … Continue reading Why are high impedances nodes slow?
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