Jan 2, 2013 #1 K Karamy Newbie level 3 Joined Jan 2, 2013 Messages 4 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,301 Hello dear , Can you help me to solve a question in darlington ? How to find the current through the 50 ohm resistor ?
Hello dear , Can you help me to solve a question in darlington ? How to find the current through the 50 ohm resistor ?
Jan 2, 2013 #2 K KonstanU Member level 5 Joined Jun 7, 2012 Messages 82 Helped 28 Reputation 56 Reaction score 27 Trophy points 1,298 Location Bayreuth, Germany Activity points 1,719 I = (2.5V-Vbe*2)/50. Roughly, Vbe equals 0.7V. So you have current about 28mA.
Jan 2, 2013 #3 K Karamy Newbie level 3 Joined Jan 2, 2013 Messages 4 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,301 Thank you dear correct answer. I have been a confused because of the 500 ohm base resistor.This means that it doesn't have any effect on the circuit ?
Thank you dear correct answer. I have been a confused because of the 500 ohm base resistor.This means that it doesn't have any effect on the circuit ?
Jan 2, 2013 #4 K KonstanU Member level 5 Joined Jun 7, 2012 Messages 82 Helped 28 Reputation 56 Reaction score 27 Trophy points 1,298 Location Bayreuth, Germany Activity points 1,719 Not so but it has negligible effect. It effects on the voltage level of Vbe.Q1
Jan 3, 2013 #5 K Karamy Newbie level 3 Joined Jan 2, 2013 Messages 4 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,301 Thank you so much.