A boost converter has an input voltage Vin= 10 V, switching frequency fs= 100 kHz, duty ratio d=50%, load resistance RL= 20Ω, inductance 100μH, and capacitance 680 μF.

If you were trying to make a boost converter enter DCM, but your load resistor could not reach Rcrit, what other controllable parameters (not including Vin) could you change to reduce

the lowest value of i_L to zero? Explain your reasoning.

what is the difference between a port and a signal?  

Are the answers to Green Building Systems and Green Construction on this website

What is an advantage of processing signals in digital format (instead of analog)?

Find the main dimensions of a 2500 KVA, 187.5 rpm, 50 Hz, 3 phase, 3 kV, salient pole synchronous generator. The generator is to be a vertical, water wheel type. The specific magnitude loading is 0.6 Wb/m2 and the specific electric loading is 34000 A/m. Use circular pole with ratio of core length to pole pitch=0.65. Find the normal speed.

Write a C program for a PIC18F4321 microcontroller to convert eight LM-34 temperature sensors, which are connecte4d to AN0 to AN7, and display on a display consisting of two 7-segment displays. Use a three-bit switch to select one of the eight sensors to display.

A classmate of yours in the mechatronics concentration notices that you study microwave engineering in your curriculum but they do not. They want to know what makes microwave engineering unique and they want to know what kinds of projects you might work on as an RF/microwave engineer. Knowing that your friend has had enough EE coursework to understand a technical answer, what would you write as a response? To receive full credit your response must be a minimum of 150 words and explain some RF/microwave applications with linkages to relevant EE theory.

EXplain current development in smart Grid with examples?Name the fundamental technologies that will drive the Smart Grid?

Design a three-stage operational amplifier at the transistor level using BJT technology. Your design should

include a differential input stage with large input resistance, a gain stage, and an output stage with low

input resistance. Justify your design choices. Use the op-amp you designed to create an inverting amplifier

using negative feedback with a given gain, A = −Rf/Ri . Provide a characterization of your op-amp design which

includes input resistance, output resistance, input bias currents, input offset current, input offset voltage, bandwidth, and slew rate. Provide a table to compare the performance of your op-amp to that of a 741. Use a transistor array (recommended) to build the circuit and test its performance by connecting it in an inverting amplifier configuration, and verifying the circuit gain. Compare the experimental results to those obtained using a 741.

Design a two-stage operational amplifier using MOSFET transistors and conduct the same type of analysis. Compare both designs in terms of their performance characteristics listed above

In this module, you studied a diode circuit known as a clipper. Think about at least one practical application of a clipper and discuss it.

Cortex-M0+ is the most energy-efficient processor in the Cortex-M family. Suppose a Cortex-M0+ processor takes 100 HA at running mode, and 50 HA at sleep mode. If the application puts the processor 50% at running mode and 50% at sleep mode, and the processor is powered by two button cell batteries with a total capacity of 600 mAh. How long can the batteries last? (Thumb of rule: Battery Life- Battery Capacity in Milliamps per hour/ Load Current in Mill amps * 0.70)

In the class, we had formulated the rules for the r’s compliment subtraction (also see section 1.5 in textbook for a summary of the rules). Formulate similar rules if you have to do the addition using the (r-1)s compliment.   

What physical device in the bathroom resembles the liquid level switch? 12. Draw logic for a motor starter control circuit for a motor that is either off, on forward or on reverse with a selector switch.

1. Describe and discuss the concept of oscilloscope “triggering” and how it is implemented in modern oscilloscopes (i.e. how the oscilloscope WORKS internally, and not simply how to use the scope). Develop your description around a block diagram of the oscilloscope. Include “typical” internal oscilloscope signal waveforms. Work a description of the function of the oscilloscope “trigger” controls into your discussion. The use of one or more references, either those cited above or some found on your own, should be useful here. Be sure to properly cite sources of your information, figures, etc. Do not plagiarize!

2. Using precise engineering terminology and possibly with the aid of schematic diagrams and charts, describe, discuss, and explain the effect that the vertical amplifier COUPLING has on the performance of the oscilloscope. When is it appropriate to use AC coupling or DC coupling? Under what conditions might AC coupling introduce errors into a measurement? Under what conditions might DC coupling introduce errors into a measurement?

3. Contrast and compare the AUTO with the NORM triggering mode.

4. a. Define, discuss, and explain the differences between precision, accuracy, resolution, sensitivity, and range as they pertain to measurements or measuring instruments. Consult reference 2 or another suitable source. b. Give numerical examples of each, i.e. for each one give a hypothetical set of data and/or measurements taken by (or given for) a hypothetical instrument and show what analysis/interpretation must be done on the data/measurements to obtain the particular parameter. Then, give the resulting numerical value for that parameter.

NoTE

Lower-dimensional materials play an important role in nanotechnology. Consider a two-dimenstional solid (such a graphene) and assume that it can only vibrate perpendicular to its own plane. Find an expression for the heat capactiy of a square chunk of this material of area, A, and evaluate the result approximately for very low and very high temperatures. Using Mathematica, plot the heat capacity as a function of temperature.