1. Explain impact ionization and zener/tunneling breakdown. Which one is likely to cause breakdown in following:

a. GaN Schottky barrier diode with barrier height 1ev.

b. Heavily doped P+/N+ GaAs diode.

c. Heavily doped P+/lightly doped N-Si diode.

Define a 3 phase short circuit and a line to ground faults in a PV system. How it affect the load and how it can be eliminated. Also make analysis on how it affect active and reactive power and the efficiency of the system.

Assume you have a WAV file containing an audio with noise. The audio was sampled with a sampling frequency of 8ksamples/second. If you play the audio file, you will be able to notice that there is a small tune along with a strong noise. Design a digital filter using Matlab or Octave to remove the noise. Write the code showing all steps of designing a digital filter? Need help please

b) The load connected to a three-phase supply comprises three similar coils connected in star. If the phase currents are 10A and the total active power and power factor absorb by the loads are 3kW and 0.8 lagging, respectively. Find:
i. The magnitude of phase and line voltages
ii. Total apparent power (1 mark)
iii. The impedance of each coil.
c) If the coil in Q3(b) are now connected in delta to the same three-phase supply, calculate the magnitude of the line currents and the magnitude of the total apparent power.
[25 marks]

Which of the following number formats can be used to represent all integers in the range 0 to 4,294,967,295?

A) unsigned integer (32 bits)

B) sign magnitude (32 bits)

C) two's complement (32 bits)

D) floating point format (IEEE754 single precision)

2. Borgmann adopts a number of Heidegger’s criticisms about technology. But unlike Heidegger, Borgmann disagrees that we should try to go back to a pre-technological attitude to mitigate against the negative aspects of technology. He embraces technology as a part of the experience of focal things and practices. Explain the role technology plays in Borgmann that is different from Heidegger using an example.

Which approach do you favor in regards to solving the problems technology poses to the environment – Reformist Environmentalism or the Deep Ecology Movement? Why?

How do techno-optimists and pessimists differ in their ideas regarding the benefits of technology, the value of technology, and the issue of control?

Pick a cellular system and describe its duplexing and multiple access scheme

why is important to consider matching in the design of a ring oscillator? What if one were to neglect matching? What impact would it have in a commercial product?

Do the VCO operate at the zero tuning voltage?

Question, Digital Signal Processing:

a)Explain in detail the difference between FIR filter and IIR filter with examples and responses . Explain briefly?

b)Write a detail note on Least Squares, explain breifly?

NOTE: write the folowing in detaill, thank you.

Saliency detection using scale change.you have to take two window of different sizes and calculate the saliency by considering the feature vector.

if you know the answer then only write or else leave for other.

image processing ELECTRICAL.