Hello.
I'm building a project where I need to have a transistor running for the first 0.1 to 0.3ms after system power-on , and then turn-off while VCC remains on.

The process is:
1) Start the system (Vcc boots)
2) Transistor turns on from Vcc being powered, emits current
3) 0.1 to 0.3 ms passes and then transistors cuts off
4) Vcc remains on for infinite time

I have looked for solutions and I know it can be done with a 555 , however, I still have the beleive it can be done with a simpler circuit (transistor, R and C) but I don't how to configure a capacitor to charge and force a cut at the base with ic=0.

All I have read is the opposite function, which is delay the startup. I look forward to hearing from you guys so we can figure this out together. Thank you in advance.

 

Something like this?

 

wow yes. that is exactly what I was looking for . It never occurred to me to run 2 transistors. The simulation runs nice, I will give it a try in the breadboard. thanks!

 

See