It sounds like a homework question but it's the summer time folks, school is out!! This is my own question From Horowitz and Hill I have this circuit:
From the book and SPICE I know that the quiescent current is about 1mA and the output voltage (Vc) is 29.4V. But I've been racking my brain trying to figure out how exactly the bias is determined. With no pins on the transistor held at any specific voltage (ground, Vcc, input), it seems like I would have to solve a system in order to figure it out, but that seems overcomplicated and lame... I need to know:
Do I need a system of equations to solve for Ic?
And how would I set the bias for a specific quiescent current? (Resistor values)
Thanks in advance
Sam Gallagher
From the book and SPICE I know that the quiescent current is about 1mA and the output voltage (Vc) is 29.4V. But I've been racking my brain trying to figure out how exactly the bias is determined. With no pins on the transistor held at any specific voltage (ground, Vcc, input), it seems like I would have to solve a system in order to figure it out, but that seems overcomplicated and lame... I need to know:
Do I need a system of equations to solve for Ic?
And how would I set the bias for a specific quiescent current? (Resistor values)
Thanks in advance
Sam Gallagher