Procedure

BJT Common Base - Input Characteristics

1. Initially set rheostat R_h1 = 1 Ω and rheostat R_h2 = 1 Ω
2. Set the Collector-Base Voltage(V_CB) 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 emitter current(I_E)in m Ampere.
5. Click on 'Plot' to plot the I-V characteristics of Common-Base configuration. A graph is drawn with VBE along X-axis and IE along Y-axis.
6. Click on 'Clear' button to take another sets of readings
7. Now set the Collector-Emitter Voltage(V_CB) to 2 V, 3 V, 4 V

Figure:1

BJT Common Base - Output Characteristics

1. Initially set rheostat R_h1 = 1 Ω and rheostat R_h2 = 1 Ω
2. Set the Emitter current(I_E)1 mA by adjusting the rheostat R_h1
3. Vary the Collector-Base Voltage(V_CB)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-Base configuration. A graph is drawn with V_{CBalong X-axis and IC along Y-axis.}
6. Click on 'Clear' button to take another sets of readings
7. Now set the Emitter Current(I_E) to 2 mA

Figure: 2