Recent content by nunez2005

i've attached the solution that i have in the book, the value of beta is 150 and R1=100k and R2=39k, the only problem I have is that how do you get to the vth while substituting beta and the resistance in both sides to be equal to -Beta (-is/beta+1), the beta + 1 has to come out from simplying...

Homework Statement I'm trying to understand where the (β+1) comes from. [b]2. Homework Equations vth=-βiR2 i+βi+is=0 vth=-β(-is/(β+1))R2 [b]3. The Attempt at a Solution vth=-βiR2 i+βi+is=0 vth=-β(-βi-is)R2