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# 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.

### Operation Amplifiers

What is the concept behind operational amplifiers, or op-amps? What is the ideal model and the practical model of an op-amp? Give examples of the applications of op-amps.

### Transformer and Power Transfer

An audio transformer is required to match an amplifier of output resistance of 300 Ω to a speaker of 16 Ω. Calculate the optimum turns ratio and briefly explain the concept of maximum power transfer. Explain the reasons why the efficiency of a large power transformer is different from that for a small transformer.

### EMC and Logic Gate Transitions

A logic gate drives a load, which has a resistance of 1 k(omega) and a capacitance of 20 pF. The pritned 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. a) Determine the maximum output current. b) What EMC hazard does the situation presen

### Mutual inductance, transformers 2 questions & solutions

FIGURE 4(a) shows two inductances connected in parallel across an a.c. supply. (a) Apply Kirchhoff`s voltage law to loop abef and to loop abcdef of the circuit. See attached

### EMC CAPACITIVE COUPLING BETWEEN CONDUCTORS

I am looking for some help with the attached problem, I have a number of similar problems to work through so if I could get a detailed solution to this problem it would greatly help my understanding and approach to my other problems.

### BJT suitability of transistor types simple circuit

Determine the most suitable transistor from TABLE B for use in the circuit of FIGURE 3. You may assume in all cases that the transistor is biased with VBE = 0.6 V. Justify your choice in detail.

### Armstrong Oscillator and Feedback Mechanisms Resulting

TMA 3 question Help Q5 (e) The given L1:L2 ratio is not necessarily the optimum value to give a good sinusoidal output. [A Fourier probe on the output will give a spectral response]. Try to devise an experiment to find the optimum ratio*. Express the ratio as a turns ratio. The report should include copies of any graphica

### Simple OP amp circuits with feedback

Hi John could you help me out with these? see attachment

### 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

### Circuits and Waveforms

A circuit supplies a 'square' current waveform, with a peak value of 25 mA and transition times of 10 ns, as shown in FIGURE 3. The ground return conductor has a resistance of 50 mΩ and an inductance of 100 nH. (a) Determine the maximum voltage drop along the ground conductor. (b) Sketch the waveform of the voltage which wil

### 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

### Operational Amplifier Property Output Responses

5. In figure 4(a) the input voltage V_in is swept from 0 to 5 V. The supply voltage is a single-rail 5 V. Explain the shapes of the output responses of the two op-amps shown in figure 4(b). See attachment for figures.

### 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)

### Control Systems and Automation

Please see the attached pdf. files for the questions on control systems and automation.

### Controlled Rectification - (Complex Waveforms & Fouriers Analysis) Problem

Attached are questions about Controlled Rectification - (Complex Waveforms & Fouriers Analysis).

### 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

### Fourier series analysis based on examining shape of given waveforms

Please find the question in the attached file and provide a full and detailed explantation of the answers to aid revision.

### 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