HW Due November 10
Q1 Using an NPN, ground the base, tie the collector to a +9V source, place a resistor,
R, in the emitter and tie it to a -9V source (this setup should look familiar):
a) Let R=5.6kΩ. Find the Q-point.
b) What value of R is required to get a current of ~100µA?
Q2 Design a circuit with “4 Resistor Biasing” for an NPN transistor with a Q-point of
(185µA, 4.93V) using one +12V power supply, RE = 16kΩ and RC = 22kΩ. (Basically,
find R1 and R2.)
Q3 Using the same circuit layout shown in class with VCC=12V, VEQ=4V, REQ=12kΩ,
RC = 56kΩ (previously it was 22kΩ) and RE = 16kΩ. What is the Q-point? Discuss
results.
