I lower the input osc to see what is going on better: https://tinyurl.com/269kqspqthe lower pnp transistor turns on with a lower voltage at its base. bjts turn on when current is pulled through the base. the pnp needs current pulled out, and npn needs current pushed in.
So the output is 180 out of phase of the input? it seems that when the input
So when the input is HIGH no current can go from the emitter to the collector so the output (collector pin) is LOW (tie to ground with 10k resistor)
When the input is LOW current can go from the emitter to the collector? why?
I have hard time to get it... :(
edit: also - the upper transistor can allow current to pass only if the base voltage is higher then the emitter voltage by 0.7V right?
The emmiter of the upper transistor is tie to the emitter of the lower transistor. this pin is not always lower then the upper transistor base..? so How its possible?
Statistics: Posted by ketem13 — Thu Nov 21, 2024 7:09 am
