Sketch the frequency domain representation of the intermediate signals involved in the “Chopper Amplifier" application. If the chopper frequency is 100kHz, and the chopper duty cycle is100D% (or, its fraction is D, a number 0-1), determine the signal amplification as a function of the band pass amplifier A and the duty cycle D.

4. Using PSPICE (or alternate) Build the circuit shown at right. Use zener diodes. The source V1 is a VSIN with amplitude of 20 V and frequency of 100 Hz. Set up a transient simulation that will run over a period of 50 ms (5 periods of the sine wave). Set themaximum step size to be 0.1 ms, giving 500 points in the simulation so that the traces in the graph willbe smooth. What to we expect from this circuit? When the sinusoid is positive, diode D2 will be forward-biased andD1 will be reverse-biased. There will be no current flow unless D1 goes into its breakdown mode. If D1breaks down, then the total voltage across the diodes will be clipped at the breakdown voltage plus oneforward diode drop: VB + 0.7. During the negative half-cycle, the opposite happens: D1 is forward-biased and D2 reverse-biased. No current flows unless D2 breaks down, in which case the voltage will beclamped at -(VB + 0.7 V). Question: What is the breakdown voltage of the diodes used in the circuit? Comment on your results

8. A ferromagnetic core with a relative permeability of 1500 is shown in the following figure. The core depth is 6 cm. Assuming the current in the coil with 250 turns to be 4 A: -) Find 4, l2, lz and l4 in meters. (4 points) Find cross-sectional area (in m²) in the four sections of the core. O Find the reluctances of each section (R1,R2, R3,R4) as defined in the equivalent circuit shown in the below figure. (4 points) O Find the total reluctance of the magnetic equivalent circuit Rtot. What is the magneto-motive force F produced by the coil in A.t? ) Calculate the total flux in the core and draw the direction of it in both figures. Calculate the magnetic flux density in the left and right columns (B1and B3). ( h) Calculate the magnetic flux intensity in the left and right columns (H, and H3).(2 points) Calculate the mmf drop across R1 and R3. (

Light-Fidelity (Li-Fi) Receiver Design Explain the basic principle of coherent detection technique inoptical wireless communications with the help of a system block-diagram.[4 Marks) Explain the basic operation of a LED and the steps involved toachieve the spontaneous emission, discuss the processes usingappropriate diagrams. Name any three properties of an LEDsthatare important for the design of a communication system.(6 Marksl A photodiode has a quantum efficiency (n) of 65 % when photonsof energy 1.5X1019J are incident upon it, calculate the followings: at what wavelength is the photodiode operating? the responsivity of the photodiode at the above wavelength. the incident power required to obtain a photocurrent of 2.5HA at the above wavelength.[3 Marks] E=hf=\frac{hc}{\lambda};R=\frac{nq}{hf}R=\frac{ip}{p^0}

3. Using PSPICE (or alternate) Build a CMOS inverter as in the figure. Set up a DC sweep simulation that sweeps Vin from 0 to 5 V in 0.05 V increments. Run the simulation. If everything was set up correctly,the voltage transfer characteristic (VTC) should be plotted.

Encode the following C/C++ strings in their ASCII representations (decimal values).End each encoding with the NULL character value 0. Write the Decimal Value for each Encoded Letter Reference Material

Model a chip resistor (size 0603) with a resistance of 50S in ADS.Consider an application in which 502 impedance must be maintained with +10%. Create a linear analysis and determine the maximum usable frequency of the chip resistor.

Consider the circuits on Figures P1a and P1b. The current gain of transistors Q1 and Q2 is B = 50. 1.What type of transistors are Q1 and Q2, shown, respectively, on Figure P1a and Figure P1b? 2. Consider the circuit on Figure P1a. Find the value of R, such that V, = 4 V. 3. Now, consider the circuit on Figure P1b. What is the value of V4 knowing that Q2 is ON?

1) Please read thoroughly the two papers provided (under files on canvas). Do additional research on these areas of virtualization, use the virtual hands on lectures, refer to sections in"Embedded Microcomputer Systems: Real Time Interfacing", Jonathan W. Valvano and summarized in your own words (2 pages) following the 2 column format in the papers. Your paper should have a Title with name and date, abstract, Introduction, Main theory and some Design approaches, implementations, discussion and related work, conclusion futurework. a)"Hardware-Assisted Reliability Enhancement for Embedded Multi-core Virtualization Design" b)"A Monitoring System Based on Embedded Internet Technology for Embedded Devices"

Design a third order Butter worth stepped (Hi-Z Low-Z) low pass filter using microstriplines for a cutoff frequency of 2.4 GHz. Draw the final schematic in terms of normalized transmission line impedances and lengths. Simulate using ADS and show S11 and S21plots to 5 GHz. Place Marker at 2.4 GHz.(33 pts)