Assignment on Electronic Devices: P-N Junction Diode and Bipolar Junction Transistor

Learning outcomes for this assignment

Module learning outcomes for this assignment:

Demonstrate the knowledge and understanding of electronic devices such as p-n junction diode and bipolar junction transistor. Knowledge and understanding.

Analyse the experimental data recorded and represent them by graphical or other means analysis.

Use appropriate mathematical or scientific techniques to evaluate engineering parameters science and mathematics.

P-N junction forward bias characteristics The diagram in figure 1 provides the voltage and current measurements shown in table 1.

Give a brief overview of the theory of the P-N junction diode. Plot the data generated in table1 using Microsoft Excel. Extrapolate the straight-line part of the graph to intercept the voltage axis and estimate the turn on voltage for the diode tested.  

Can you estimate the resistance of this diode? How does the theory relate to the experiment?

P-N junction forward bias characteristics The diagram in figure 2 provides the voltage and current measurements shown in table 2 and Plot the data generated in table 2 using Microsoft Excel and comment on your observation. V1 D1 1N4148 XMM1 XMM2 3. Half wave rectifier The diagram in figure 3.1 provides the measurements shown in figure 3.

Give a brief overview of the theory of the half-wave rectifier. Observe the traces of the input and output signals and comment on your results. What is the average value of the input and output signal?

Full wave Bridge rectifier. The diagram in figure 5.1 provides the measurements shown in figure 5.2

AC to DC conversion using a capacitor. The diagram in figure 6.1 provides the measurements shown in figure 6.2

Comment on the output signal observed. What is the DC value of the voltage as seen on your oscilloscope? What would happen if the resistance value was increased to 100kΩ?

Input Characteristics The diagram in figure 7.1 provides the measurements shown in table 7.1

Output Characteristics The diagram in figure 8.1 provides the measurements shown in table 8.1 Initially, for this experiment, VBB was adjusted so that the base current was set at 10µA. Throughout the measurements IB remained at 10µA. The experiment was then repeated for IB = 20, 30 and 40µA.

Using Microsoft Excel, plot IC versus VCE for all the values of base current shown. Using your graph, determine the value of the current gain β at constant value of VCE. VBB XMM1 Q1 BC107BP XMM2 XMM3 VCC VCE 9. Designing inverting operational amplifier with a gain of 10. From the trace below, select R1 and R2 to give the appropriate gain of the amplifier. If the frequency of the input signal is increased to 100kHz, 1MHz, 10MHz and 100 MHz what would happen to the output signal?

Designing operational amplifier circuit For the summing amplifier of Figure 10, obtain values of R1, R2, R3 and Rf that achieve the following output. Assume that the minimum input resistance is 30 k?. Show the formulas used and all working out.