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# Electrical Engineering

### Example of Infared PLCP Frame

The diffused infrared PHY layer convergence procedure standards (PLCP) reformats the data received from the MAC layer into a frame that the physical medium dependent sublayer can transmit. Give an example of an infrared PLCP frame illustrating its component parts and the function of each part.

### Z-Transform, Unit-pulse response, Impulse response, Inverse Fourier transform, Linear time-invariant continuous-time system, Differential equation, DTFT

Please see the attachment for the problems.

### A C++ Example of Classes and Inheritance

Write a C++ program that uses 7 classes following a tree inheritance structure. The base class must also have a virtual print() function that displays the class name. Randomly assign print functions in three other classes that display the class name. Create 7 pointers of the base class and have them point to all the cla

### Compute the gain in energy for the charge.

A region in space has an Electric field given by E = x(x^) - y(y^) + xy(z^) where (x^), (y^), (z^) indicate corresponding letter with caret on top of it. A charge of 1 uC moves along a straight line with constant velocity from (0,0,0) to (1m,1m,1m). What is the gain in energy for the charge? Please provide a step by step s

### Linear time-invariant continuous-time system

1. Is the linear time-invariant continuous-time system with the impulse response h(t) = sin 2t for t ≥ 0 BIBO is stable? Explain. 2. Determine if the linear time-invariant continuous-time system defined by: is stable, marginally stable, unstable, or marginally unstable. Show work. 3. Compute the steady-state

### Z-Transform for Discrete-Time Signal

1. A linear time-invariant discrete-time system is excited by the input x[n] = d[n] + 2u[n-1] (d represents &#948;(delta)). The resulting output response with zero initial conditions is y[n] = ((0.5)^n * u[n]). Determine the transfer function of the system. 2. For a discrete-time signal x[n] with the z-Transform: X(z) = z /

### Multiple access technologies FDMA, FDMA and CDMA.

In design of radio systems that incorporate wireless networks, considerations must be taken such as user access, transmission direction, switching and signal strength. Explain multiple access technologies FDMA, FDMA and CDMA regarding: a. How they are used. b. Address their strength and weakness. c. Which technology, in yo

### Z-Transform, Discrete-time signal, Steady state response, Transient response

Please see attached file for the questions.

### Laplace Transform, Differential Equation and Inverse

Use Laplace transforms to compute the solution to the given differential equation. Please look at the attachment for further details. Use Laplace transforms to compute the solution to the differential equation given below. (d^2 y(t))/(dt^2 )+6 dt/dt+8y=u(t) where y(0)=0;y ̇(0)=1 Compute the inverse Laplace transform of:

### Computing a Discrete Time Fourier Transform

1. For a discrete-time signal x[n] with the DTFT where b is an arbitrary constant compute the DTFT V(Ω) of v[n] = x[n] - x[n-1]. 2. Compute the rectangular form of the four-point DFT of the following signal, which is zero for n<0 and n>=4. 3. Compute the inverse DTFT of: X(ω)=sinΩ cosΩ 4. Compute the inverse DTFT of

### State Space Equation

For the given circuit diagram, select the state variables as a subset of nodal current and loop voltage. Also determine the state space equation and transfer function of the circuit. Please look at the attached file for further details. Kindly give a detailed step by step solution.

For the circuit in attached image, a) Find the Laplace voltage Vout(s). b) Find the inverse Laplace Transform of the voltage. c) Find the steady-state voltage. Please show full work with explanations.

### Laplace Transform: Example

Please give step by step answers with explanations, for the problems in the attached document. I have done the problems but want to make certain if I am in the right direction and learn where I have gone wrong.

### Laplace Transformations and Inverse Laplace Transformations

1. Find the Laplace transform of 6 cos t + 2e −3t . 2. Find the Laplace transform of 2 cosh t + 2t 3. 3. Find the Laplace transform of 2te −3t. 4. Find the inverse Laplace transform of s/s+2. 5. Find the inverse Laplace transform of 1/s+5. 6. Find the inverse Laplace transform of 1/( s + 5 ) ( s 2 + 1). 7.

### Loop function, Phase margin, Gain margin, Nyquist plot

Please view the attachment for problems.

### ELECTRIC DIPOLE MOMENT

Two Electric Dipoles denoted by p1 and p2, p1=2*10^-29 c-m in the direction of z @(x,y,z)=(0,0,0) p2=2*10^-29 c-m in the direction of y @(x,y,z)=(0,5*10^-10 meters,5*10^-10 meters) determine potential V @ (x,y,z)=(0,5*10^-10 meters,0) (x,y,z)=(0,0,5*10^-10 meters)

### 555 Timer Astable Multivibrator

Fill in the blanks. In order to increase the frequency of operation of the 555-type astable multivibrator, you must _________________ the value of the timing capacitor, or you can _____________ the value of either or both of the timing resistors.

### Calculate current through a zener diode.

Calculate the value of the current through a zener diode if the power supply is rated at 24 volts @ 500 milliamperes, the load voltage is 12 volts and draws a current of 300 milliamperes. Also calculate the value of the series resistance R.

### What is the voltage gain of the middle stage amplifier?

I have attached a file that contains the schematic. 1) What is the voltage gain of the middle stage? 2) Describe the main function/advantage provided by each stage used in this amplifier. 3) What would be the effects, if a bypass capacitor were added across R(E2)?

### Estimate the Ron of the Switch.

Refer to the attached figure. Suppose that the input sine wave has amplitude 5Vpp and the scope measures an output amplitude of 45mVpp. Estimate the Ron of the switch. (Note that when the switch is "ON", the output is "OFF"; don't confuse the two.)

### Schmitt Trigger

Use the approximate output voltage levels to predict the switching thresholds (the input voltage levels that cause a switching of the output) of Schmitt trigger. Please see the attached files for further details.

### Output voltage in Amps

Consider the circuit in attached figure L9.12. Suppose that the voltage at the V+ input pin of the op-amp is +5VDC. What will the output voltage out be if the input voltage is in=3V? What will the output voltage out be if the input voltage is in=7V? Op amps are a new concept to me so i need help understanding how they behav

### Peak to peak triangle wave amplitude at the output

I am having a hard time understanding the behavior of op-amps. Refer to attached figure L9.4. Predict the peak-to-peak triangle wave amplitude at the output that would result from a 2Vpp 500 Hz square wave input.

### Op-Amps and ICs

Please see the attachment for referred figures. 1. The midrange open gain of a certain op-amp is 100,000. If the open loop critical frequency is 75 Hz, what is the open loop gain at 1 KHz? 2. A certain op-amp has three internal amplifier stages with the following gains and critical frequencies: A1 = 50 dB at f1 = 1000Hz, A

### Chip Design: Composite Mask Yield

Consider a chip design using 10 mask levels. Suppose that each mask can be made with 98% yield. Determine the composite mask yield for the set of 10 masks. Would the processed chip yield be lower or higher than this composite yield? If your results are inconclusive, explain the reason.

### Z-Transform Discrete-Time Signals

Attached are three problems that I am working. Any assistance would be greatly appreciated. For a discrete-time signal x[n] with the z-Transform: X(z) = z ________________________________________8z2-2z-1 find the z-Transform, V(z) for the signal v[n] = e3nx[n]. See attached for the rest of the

### Computing DTFT

Having problems working out DTFT properly. Attached is 5 problems. Request assistance with these and if possible short narrative to each step to help me understand better. 1. Compute the DTFT of the discrete-time signal shown in the Figure below. 2. For a discrete-time signal x[n] with the DTFT where b is an arbi

### Porblems in Electrical Engineering

Representative problems: 1. A function is continuous but its first derivative has a finite discontinuity at the origin. What is your estimate of the rolloff rate? 2. A system is characterized by a transfer function H(s) = 1 / s+5 . What is the natural response of the circuit? 3. If a function is even, then its Fourier tran

### Simple Capacitor Problems

(a) A conducting sheet of material (see attachment 'a') has a cross-sectional area (l x w) of 10mm x 20 mm. The material has a resistivity of 103 &#8486; m. Calculate the thickness, t, of the material required to give a resistance of 5k &#8486;. (b) A capacitor is formed by two parallel metal plates separated by a dielectr

### Finish the state graph for a moore network......

Help needed: I don't understand the concept so i need detailed explanation please. I have the solution but don't understand how to approach it. How would the values change if it were a mealy network? A file has been attached explaining the problem.