Explore BrainMass

Electronic Engineering

Circuit Plotting

How would I plot a graph for the following RLC circuit which shows the magnitude of Z (the input impedance) as a function of frequency from 10Hz to 10KHz? See attached file for full problem description.

Circuit Analysis

Consider the given circuit; the voltage step is an "ideal" pulse going from 0V to 4V and then back to 0V; the pulse width is 5 microseconds wide. How do I find the voltage across the resistor, Vr(t) 7 microseconds after the rising edge of the input impulse?

Phase angle and margin

I'm trying to find the angles of departure and angles of arrival for an equation. In my current problem, I am looking for the angle of departure for GH=10(s+z)/s^2 (also GH(jw)=10(jw+z)/(jw^2) The angle of departure is defined as 180 degrees plus the phase angle of GH computed at the complex pole, but ignoring the contrib


A capacitor is used in the electronic flash unit of a camera. A small battery with a constant voltage of 6 V is used to charge the capacitor with a constant current of 10 microamperes. How long does it take to charge the capacitor when C = 10 microfarads? My Answer: V=6V i=10mA C=10microF Wc=1/2CV^2*(t) Wc=1/2(10^-5)6^2*(t

Electric Heater: Power and Resistance

The Problem: An electric heater is connected to a constant 250-V source and absorbs 1000 W. Subsequently, this heater is connected to a constant 210 V source. What power does it absorb from the 210-V source? What is the resistance of the heater?

Closed Loop Control Systems

2. a) In this question you have to determine the closed loop transfer function and then use the characteristic equation to determine the closed loop poles (roots) of the system. Prove that the closed loop transfer function is given by: C(s)/R(s) = G(s)/(I + G(s)H(s)) b) What is the significance of the characteristic equati

Logic Circuit Question

Question: The outputs of two "NAND" gates are connected to the inputs of an "Exclusive Or" gate. Each of the "NAND" gates has one input at a logic high level, and the other input at a logic low level. What is the output of the "Exclusive Or" gate? a) Logic high b) Logic low c) Logic low, unless the output is "open collecto

RC Series Circuit

I am attaching a scanned image of a question, please answer and include the method used for solving. See attached file for full problem description.

Transient response of second order circuit

Assume DC steady-state conditions exist for t>0. Determine the voltage across the capacitor and the current through the inductor and Rs2 as t approaches infinity. See attachment for diagram.

Current Through a Capacitor in Steady State Conditions

Determine the current through the capacitor just before and just after the switch is closed in the figure. Assume steady-state conditions for t<0. V1 = 12 V C= 0.5uF R1 = 0.68K Ohms R2 = 1.8K Ohms Please see attachment for diagram.

Working with Electrical Grounding and Polarity

To whom it may concern, From chemistry I understand that electron flow is from negative to positive, in the external circuit. I also understand that "conventional current" flows positive to negative, and is used to solve mathamatical electricity problems and it was determined back in the day as current direction. But, if t

Symmetrical Components of Line Circuits

Determine the symmetrical components of the following line circuits: Ia = 100A, Ib = j100A, and Ic = 0A. There are four possible options in the attached file.

Control Systems - Root Locus

Draw the positive and negative gain root locus for the closed loop system with the open loop transfer function L(s)=... The following information may be used: Angles of departure... Break away points... (See attachment for all details).

Nyquist, Bode Plot and Root Locus

A) Analyse the closed loop stability of the system with open loop transfer function {see attachment} i)Make a sketch of the Bode diagram and hence the full Nyquist diagram, showing all relavent details ii) If the system is unstable, state the number of closed loop right hand plane poles and comment on how you might stabili

Root Locus of a System

Draw the root locus for the system with the open loop transfer function given in the attachment that is connected to a negative feedback loop and confirm the relevant break-away points are at s = 0 and s = -1. See the attached file.

Determining sequence of output waveforms

I have come across this question in a mock exam paper and although I believe it is quite simple, I am having problems deciding how to complete this question. Could you please answer this question and explain your results so that I can understand how to answer such questions in the future. Please see the attachment

Design a Highpass FIR Filter Using Kaiser Window

Design a highpass FIR filter using Kaiser window design technique. This problem is from the textbook 'Digital Signal Processing using MatLab' by Ingle/Proakis. Design a highpass FIR filter using Kaiser window design technique. The specifications are: Stopband edge: 0.4pi;, As = 60dB Passband edge: 0.6pi;, Rp = 0.5dB W

Problem on how to find the voltage gain of the amplifier

A power amplifier when driven by a current source of 5mA rms and a source resistance of 8k, delivers 12.5W signal power to an 8k load resistance. Find peak to peak value of the output voltage. If the input voltage to the amplifier shows 5V rms, determine the voltage gain of the amplifier. Show how you arrived at your answer.

Determining Angular Frequency from Period

A sinusoidal voltage has a maximum value of 100V, and the value is 10V at t=0. The period is T=1ms. Determine the angular frequency, w, in rad/sec. a) 3.14 b) 6.28 c) 3142 d) 6283

FINFET---a type of MOSFET

The question is below. Please include where you find the resource to answer this question. Thanks. As the gate length of MOSFET transistor shrinks to nanometer scale, the operation of MOSFET is limited by fundamental physical process. One of the most severe limitation is the inability to reach complete cut-off mode for nano

Bode Plots and Harmonic Response

Please see attachment. a) Draw the Bode plot (on semi-logarithmic graph paper) of the transfer function. see attached aii) From the Bode plot, what would the approximate harmonic response of the above system to an input, u(t)=sin(2t)? Confirm your answer by simple calculation.

Numerical Integration and Euler's Formula

For this question, please leave out the proof. Assume the formula is already known. Also, instead of assuming a unit step of U(t) = 1(t), change the question to a sinusoidal input of U(t) = sin(2t). Please solve this question and explain all the steps in detail.