Name:
- This circuit is used to switch a load represented by R2. If R2 is 100 Ohms and the
current gain of the transistor is at least 100, what is the smallest value
for R1 to ensure the transistor saturates?
- a) What is this configuration of transistors called?
b) What is the main desirable feature of this circuit?
c) Give an example of a use for this circuit.
- a) What is this configuration of transistors called?
b) What is the main desirable feature of this circuit?
c) Give an example of a use for this circuit.
- What is the purpose of the diode in this circuit?
- If each transistor in this circuit has a current gain of 200, what is the current gain of the whole circuit?
- Describe the operation of a bipolar transistor in terms of its base and collector currents.
- What is the voltage gain of this circuit?
- If you measure the collector current (Ic) and the base current (Ib) and calculate Ic / Ib, what have you calculated? Assume the device is neither cut-off nor saturated.
- In this circuit, if you gradually increase the base current ...
a) When the base current is zero, what will the collector voltage be?
b) When the base current is zero, the transistor is said to be ______ ______.
c) As the base current is increased, what first happens to the collector voltage?
d) As the base current is further increased, when the collector voltage stops changing, what will the approximate collector voltage be?
e) When the collector voltage is low and no longer changing, what is this condition called?
- When a transistor heats up, what happens to the current gain?
- When a transistor heats up, there is a risk of failure called
______________ ______________.
- In this circuit, what is the base emitter voltage when the transistor is ...
A)
saturated?
B) cut off?