Hello,
I am having some difficulties with an assignment I was given. I'm supposed to determine the values for R1 and R2 such that the currents I1=1 mA and I2=10 mA. The only parameters given is that VCC=+5 V, Vee=-5 V, UBE=0.7 V and the transistors has a high beta value. The voltage drop across R2 can be omitted.
I've been working at this all day, but I have not for the life of me figured out how to get a determine the values for R1 and R2 if you don't know the value of R3. The current I2 is going to depend on the value of R3, and for all we've learnt this type of configuration is going to allow the current I2 to be less than or equal to the reference current I1, not higher than the reference.
The only progress I've been able to make is through KVL that R1 is approximately 9.3 kOhms to get I1 to be 1 mA. But after that it stopped short, I'm really confused as to how you should find the resistor values without knowing the value of R3.
Any hints or tips would be greatly appreciated!
Thank you.