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1. Explain how it is possible to identify the different current transport mechanisms that dominate the total current flowing through the pn junction. Why is this information is important to device engineers?
2. From a simple pn junction diode, predict the expected relative magnitudes of ac capacitances in a bipolar junction transistor under normal operating conditions(base emitter junction forward biased and base collector junction reverse biased).Discuss the base emitter capacitance and base collector capacitance
design a regulated poewr supply with these specs Output a dc voltage of 10 V Load Variation: 0.3 -10000ohms Ripple Factor: less 0.1% for 2000ohms load
a 3 V voltage generator is depicted as a thevenin model, the impedence of the generator is represented by a parallel resistor-capacitor combination, the value of the resistor is 20 ohms and the value of the capacitor is 10 farad.
A parallel-plate capacitor has plates of very large extent such that the electric field is perpendicular to the plates. The plates are separated by a distance of 1mm, and a voltage of 100 V is applied to them.
What is the minimum output voltage of the Ratio detector. When the maximum discriminator output voltage is fed into an audio amplifier, the amplifier drives 100 Watts into an 8 ohm load. What is the dB gain of the audio amplifier.
Design a circuit that will add either 1 or 2 to a 4-bit binary number N. Let the inputs N3, N2, N1, N0 represent N. The input K is a control signal. The circuit should have outputs M3, M2, M1, M0, which represent the 4-bit binary number M.
Consider a direct sequence spread spectrum (DSSS) system attempting to transfer data. The DSSS system has a data rate of 2 Kbps (2 thousand bits/sec) which is spread to 2 Mcps
C program: counting numbers between 0-9, Write a C program that generates one hundred random integers between 0 and 9 and displays the count for each number.
A balanced three-phase distribution line has an impedance of 1+j8 I per phase. This line is used to supply 3 balanced three-phase loads that are connected in parallel. The 3 loads are L1= 120 kVA at 0.96 leading pf, L2= 180 kVA
What is the difference between multiplexing and multiple access?
A modulating signal consists of two sinusoidal components: 1 kHz and 3 kHz. The transmitter carrier frequency is 80 kHz. Assume in a SSB-USB modulated signal that the inserted carrier at the receiver is 200 Hz too high. Indicate the frequencies of..
a) Draw the state diagram b) Draw the schematic for the logic to implement this circuit using Inverters, AND gates, OR gates and D flip flops. Use the reverse side and additional sheets if needed.
Design your concept of a device and describe its operation in terms of the topics in the course (solid states course). For example, maybe you can make a new type of solar cell based on semiconducting liquids
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