do you mind explaining this BJT inverter (NOT Gate) to me?
When Vin = 5V, how is V3 (or V base) = 0.83V ? How do we know what the current and the voltage drop across that resistor is? and how does the output V4...
is that so...? Hmm... i was recommended to take that test by someone who has a PE in Civil Eng. He said that test is recognized internationally, so if I want to work in some other country someday, and I do like to travel, that would definitely help he said.
anyone else have taken this test?
wow ok this is much clearer now. some bulbs light up in my head.
so, in this example's PNP circuit, VE = VB + 0.7v. Since there is a Resistor in series with the emitter, assuming
R = 100 ohms,
IB = 10 mA,
IC = 10 mA * 200 = 2000 mA,
IE = 2010 mA,
VE = 100 ohms * ~2A = 200 V, and...
WOW! thanks for the very long explanation. i appreciate you taking your time. that'll take some time for me to digest. i think you're right, i dont have a good grasp on the concept of BJTs just yet. many things u said in #2 still sound like gibberish to me, like this one:
why does the...
I hope you guys can help me with my confusions here:
1) I don't understand the usage of transistors as switches. Why would you use transistors as switches, and how does that work??
2) Why would you choose a PNP over an NPN transistor. I've been reading this book and I don't...