Share
Explore BrainMass

Electronic Engineering

Electronic engineering is a discipline where non-linear and active electrical components are utilized to design electronic circuits, devices and systems. Electronic engineering has many subfields including analog electronics, digital electronics, consumer electronics, embedded systems and power electronics. It deals with the implementation of applications, principles and algorithms developed within many related fields.

Electronics is a subfield of electrical engineering. An academic degree with a major in electronics engineering can be obtained through some universities. In the early years, computer engineer was used to refer to a subfield of electronic or information engineers. Today, computer engineering is now considered a subset of Electronics Engineering and computer science.

Electronic engineers design and test circuits that use electromagnetic properties of electrical components such as resistors, capacitors, inductors, diodes and transistors to achieve particular functions. For example, the turner circuit allows the user of a radio to filter out all but a single station.

Electronic engineers design integrated circuits but first constructing circuit schematics that specify the electrical components and describe the interconnections between them. They then convert the schematic to actual layouts. This conversion is done through software but will require human fine-tuning to decrease space and power consumption. 

Circuit analysis with LEDs, BJTs, Relays, Opto Couplers

(b) The diagram of FIGURE 2 shows a bi-directional opto coupler input interface circuit. When a supply voltage of 20 V is applied the LED carries a current and 2 V is dropped across it. Calculate the value of the LED current and the value of current through the 3 k resistance. External wiring

Karnaugh Map reduction for D Type Asynchronous counter design

Q4 A three-stage type D counter circuit is required to produce the waveforms below (see Question4 attachment). A skeletal form of the counter circuit is given in the PSpice schematic* (Question4PSpiceschematic attachment), along with the associated truth table (Question4TruthTable attachment). The outputs of the circuit are A

Discrete-Time Signals and Systems

1. Compute the unit-pulse response h[n] for n=0, 1, 2 for the discrete time system y[n+2] + 1/2y[n+1] + 1/4y[n] = x[n+1] - x[n] 2. Determine if each of the following signals is periodic. If a signal is periodic, what is its period? x[n] = 3sin(100n) x[n] = 4cos(1.5πn) 3. For the discrete signals defined as the

Control Loop Feedback Diagram

I have completed the block diagram for the attached question, however I am having problems deriving an expression for the transfer function, in terms of parameters k1, k2, k0 and kt.

Basic 1D signal presentation and plotting in MATLAB

Include answers for Problems and include MATLAB coding along with any output plots that support solutions 1. The input-output equation characterizing an amplifier that saturates once the input reaches certain values is: (see attached file for equations) Where x(t) is the input and y(t) the output. a. Plot the relati

Human Discharge Through a Resistive Object

FIGURE 1 shows the electrostatic equivalent circuit of a human being. A person is charged to 20 kV and touches an object having a 50 Ω resistance to ground. Determine the following: (a) the maximum current which will flow in the object (b) the rise time of the current (c) the decay time of the current (d) the maximum volt

Estimating Resistance Change of a Resistor/Conductor

Task: Thin Manganin wire of the length l = 0.5 m is glued to the electrically insulating rod. The insulating rod is subsequently stretched by applying axial mechanical force. Prior to stretching the resistance of Manganin wire was R0 = 10 Ω and after applying the axial force R1 = 10.01 Ω. Determine: a) diameter of the wir

Operational Amplifier Stability and Compensation

3. a) Explain what is meant by 'unconditional stability' in an op-amp. b) Figure 2 gives the open-loop response of an uncompensated op-amp. Compensation is to be applied to the amplifier to make it unconditionally stable. Estimate the frequency at which the breakpoint of the compensated response must occur. See attachme

Series RC Circuit

A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged?

Parallel RL Circuit

A parallel RL circuit has the values, R = 5kohms and XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, delivered by the voltage source Vt.

Bipolar junction transistor analysis

Determine the voltage VO in the circuit of FIGURE 1 for: (a) β = 50, VBE = 0.7 V (b) β = 250, VBE = 0.7 V. Comment on the significance of your result. (Figure 1 attached)

Differential and Instrumental Amplifiers

The solution covers in a detailed and explanatory manner the following topics: - Op-amp ''golden rules'' as an introduction to op-amp circuits - Differential amplifier structure with detailed graphical representation - Derivation of the differential amplifier gain expression followed by the example of how to calculate t

Transient current of logic gate due to change in logic

A logic gate drives a load, which has a resistance of 1 kΩ and a capacitance of 20 pF. The printed circuit track connecting the gate to its load has an 40 pF capacitance to ground. The output changes state from 2.5 V to 0 V in 200 ps. Determine the maximum output current to find the the initial surge of current for (a) use I

OP AMP DC Voltage Analysis (ideal Op Amp Assumption)

Need help understanding the voltage questions attached. A step-by-step explanation would be helpful. Please see attachment for figures. FIGURE 1 shows two amplifier circuits, each of which has one or two unknown voltages (shown highlighted). Select, from TABLE A, the most appropriate value for the unknown voltages for each circ

Example of Transient Response in Time Domain

Please see the attached file for full problem description. Please give a full detailed explanation of the questions in the attached file to give me an in-depth understanding to aid revision. Sketch, on a set of common axes, waveforms to represent the transient response of circuits having transfer functions with the followin

Laplace Circuit Analysis

Please give a full and simplified answer to all parts of question 6 to aid me with revision. When a force F is applied across the face of the crystal, the current is generated. The interconnecting cable can be represented by a lumped capacitance CC. The input resistance of the amplifier, RL, acts as a load to the crystal. T

Fourier analysis using Excel

The supply current was sampled 1024 times over a very short time interval. The data so obtained is given in column B of the accompanying Excel worksheet (see attached). This worksheet has been set up to give a graph showing the spectral components of the data. Question 3 i) Obtain the Fourier Transform for the data using t

General Electrical Engineering Questions

1. For the circuit given in FIGURE 1 the power factor is 0.72 lagging and the power dissipated is 375 W. FIG. 1 (see attachment) Determine the: (i) apparent power (ii) reactive power (iii) the magnitude of the current flowing in the circuit (iv) the value of the impedance Z and state whether circuit is inductive or capac

DC Circuit Properties

See attachment for better symbol representation and diagrams. 1. The diagram of FIGURE 1 represents a meter shunted by a parallel resistance RS. (a) Determine the required value of the shunt resistance if the maximum value of the current I is 200 A. The meter can read a maximum of 1 mA and has a resistance

Waveform analysis and inverse Laplace transforms

1. For the waveform shown in FIGURE 1 (see attached file), estimate: (a) the damping factor (you may compare response with a standard chart) (b) the forced or damped frequency of oscillation (c) the natural or undamped frequency 2. Complete the following inverse Laplace transforms (see attached files)

Transmission Errors in System A

See the attached file. 2. System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is, a repeater failure is, and a bridge failure is, derive an expression for parts (a) to (e). 50 points a) Probability of fail

Solve: Unit Pulse Response

Please show the detailed steps: Compute the unit-pulse response h[n] for the discrete-time system y[n+2]+2y[n+1]+y[n]=x[n] (for n = 0, 1, 2, 3).

Plotting through matlabMatlab

Consider a finite-support signal x(t) = t 0<=t<=1 and zero elsewhere. - Using Matlab, plot x(t+1) - Using Matlab, plot x(-t+1) - Add the above two signals together and plot the new signal y(t).