ELEC 354 Electronics I. Bipolar Junction Transistors: DC Analysis
Example 1.
Analyze the following circuit to determine all node voltages and branch currents. Assume β = 100.
Example 2.
Redesign the circuit in example 1 (i.e., find new values for RE and RC ) to establish a collector current of 0.5 mA and a
reverse-bias voltage on the collector-base junction of 2V.
Fall 2007
ELEC 354 Electronics I. Bipolar Junction Transistors: DC Analysis
Example 3
Analyze the following circuit to determine all node voltages and branch currents. Assume β = 100.
Example 4.
Analyze the following circuit to determine all node voltages and branch currents. Assume β = 100.
Fall 2007
ELEC 354 Electronics I. Bipolar Junction Transistors: DC Analysis
Example 5.
Analyze the following circuit to determine all node voltages and branch currents. Assume β = 100.
Example 6.
For the circuit in example 5, find the largest value to which RC can be raised while the transistor remains in the active
mode.
Fall 2007
ELEC 354 Electronics I. Bipolar Junction Transistors: DC Analysis
Example 7.
Analyze the following circuit to determine all node voltages and branch currents. Assume β = 100.
Example 8.
Analyze the following circuit to determine all node voltages and branch currents. Assume β = 100.
Fall 2007
ELEC 354 Electronics I. Bipolar Junction Transistors: DC Analysis
Example 9.
Analyze the following circuit to determine all node voltages and branch currents. Assume β = 100.
Example 10.
If the transistor in the circuit of example 9 is replaced with another having half the value of β, this is β = 50. Find the
new value of IC and express the change in IC in percent form (ans: IC = 1.15 mA, -10%)
Fall 2007