***** PLEASE solve using MATHCAD, I am unsure on how to solve properly with this application. Thank you so much!

Problem 7:

Design a Silicon diode that has a breakdown voltage =20V and has a junction capacitance of 1 pF at no biasing.

Exam question 8: Instrumentation amplifier - Input coupling

8.a): What is the purpose of implementation of an input coupling on an instrumentation amplifier to measure the electrophysiological signals?

(Hint: This is the first component of our electronic system; i.e. the component to which the electrodes are connected. This means that it is necessary to consider safety aspects and that it is the part of the instrumentation system that is most sensitive to noise.)

8.b): Draw an example of an AC-coupled instrumentation amplifier and explain the diagram.

(Hint: What does AC coupling mean when translated into filter terminology (high-pass, low-pass, band-pass, etc.))

8.c): Which type of noise can you reduce by an implementation of the things you described in 8.b)?

(Hint: What noise typically occurs in this frequency range? (according to the answer to 8b))

*** Please solve Problem 3 using MATHCAD I am unsure how to properly use MATHCAD so this would be a tremendous help. Thank you

1.

A Si diode doped with ND=2x1016 cm-3 and NA=2x1017 cm-3. The area of the diode is 5m x5 m. If the voltage across the diode is zero:

a) Calculate the majority and minority carrier concentrations for the n-side, nn0 and pn0.

b) Calculate the majority and minority carrier concentrations for the p-side, pp0 and np0.

c) Calculate Vbi.

d) Calculate W for the above diode.

e) Calculate xn0 and xpo for the diode above.

f) Calculate Em for the device above.

g) Calculate CJ for the above diode.

Problem 2:

3.

Problem 3:

Repeat (a) to (g) of problem 1, if a reverse bias voltage VR = ̶ 10V is applied.

Find and Sketch the Step response of following RLC circuit.
1) Series RLC circuit
2)Parallel RLC circuit
simulate these on Multisim software and Also show overdamped,critical damped,underdamped Graph in Transient analysis.
note: Circuit should be any and simple of your choice.

modern control

Briefly explain the working of different types of Linear Induction Motor and its applications

Objective: Design, construct, and test a three-bit counter that counts up or down. An enable input E determines whether the counter is on or off.

 If E=0, the counter is disabled and remains at its present count even though clock pulses are applied to the flip-flops.

 If E=1, the counter is enabled and a second input, x, determines the direction of the count.

 If x=1, the circuit counts upward with the sequence 000, 001, 010, 011, 100, 101, 110, 111 and the count repeats.

 If x=0, the circuit counts downward with the sequence 111, 110, 101, 100, 011, 010, 001, 000 and the count repeats. (Do not use E to disable the Clock) Note: Design the sequential circuit with E and x as inputs.

You are given the task of combining both analog phase modulation (PM) and analog frequency modulation (FM) transmitters. Describe the procedure to combine these transmitters into a single one in such a way that your new transmitter operates only in one of the modes (either analog PM or FM) at a time based on the arbitrary choice of transmitter side user and the transmitter side user could change the mode anytime he/she wants during the operation.

a. With well labeled diagrams, list and describe the function of the various parts of an analog and a

digital multimeter

b. In your own words, explain how the following electronic components can be tested using a

multimeter. Also draw their circuit symbols

LED Resistor Transistor

Battery Capacitor Diode

Fuse Inductor Switch

Three equal impedances, 60 + j30 Ω each, are delta-connected to a 230-V rms, three-phase circuit. Another three equal impedances, 40 + j10 Ω each, are wye-connected across the same circuit at the same points. Determine: (a) the line current (b) the total complex power supplied to the two loads (c) the power factor of the two loads combined

2. (a) Explain about heterojunction and draw different types of heterojunction band-diagram?

(c) Using semiconductors in (b), explain the structure of thin-film heterojunction solar cell which is capable of separating the photoexcited electrons and holes efficiently, and show the direction of incoming solar light in order to achieve the optimized energy conversion efficiency.

Explain why there is the optimized bandgap for single-junction photovoltaic cell, in which the cell efficiency initially increases as a function of bandgap, reaches a peak at certain value of bandgap, and then decreases as bandgap further increases.

Explain difference between superstrate and substrate configuration in thin-film photovoltaic cells.

1 The line to ground voltages on the high voltage side of a step-up transformer are 100 kV, 33 kV and 38 kV on phases a, b and c respectively. The voltage of phase a leads that of phase b by 100° and lags that of phase c by 176.5°. Determine the symmetrical negative phase sequence component of phase a.

2. A 3-phase, 4-wire system supplies loads which are unequally distributed in the three phases. An analysis of the current flowing in A, B and C lines show that in line A, the positive phase sequence component is 200/0° A and the negative phase sequence component is 100/60° A. The total observed current flowing back to the supply in the neutral is 300/300° A. Calculate the current in line B.

3. A 100 MVA, 20 kV alternator has X1 = X2 = 0.20 pu and X0 = 0.05 pu. The neutral of the generator is grounded through a reactor. Find the ohmic value of reactor to limit the current for a single line to ground fault equal to the current for a three-phase fault.

1. What is the safety hazard associated with leakage currents? What are the requirements of standards in your facility for protection against such hazard (you must state the standard)? E.g UL, CSA, IEEE, AS Standards