Procedure

BJT Common Emitter - Input Characteristics

1. Initially set rheostat R_h1 = 1 Ω and rheostat R_h2 = 1 Ω
2. Set the Collector-Emitter Voltage(V_CE) to 1 V by adjusting the rheostat R_h2
3. Base Emitter Voltage(V_BE) is varied by adjusting the rheostat R_h1.
4. Note the reading of Base current(I_B)in micro Ampere.
5. Click on 'Plot' to plot the I-V characteristics of Common-Emitter configuration. A graph is drawn with V_BE along X-axis and I_B along Y-axis.
6. Click on 'Clear' button to take another sets of readings
7. Now set the Collector-Emitter Voltage(V_CE) to 2 V, 3 V, 4 V

Figure:1

BJT Common Emitter - Output Characteristics

1. Initially set rheostat R_h1 = 1 Ω and rheostat R_h2 = 1 Ω
2. Set the Base current(I_B)15 uA by adjusting the rheostat R_h1
3. Vary the Collector-Emitter Voltage(V_CE)is varied by adjusting the rheostat R_h2.
4. Note the reading of Collector current(I_C).
5. Click on 'Plot' to plot the I-V characteristics of Common-Emitter configuration. A graph is drawn with V_CE along X-axis and I_C along Y-axis.
6. Click on 'Clear' button to take another sets of readings
7. Now set the Base Current(I_B) to 20 uA

Figure: 2