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Electrical Engineering

Capacity, Data and Transfer Rates, Access Time of Disk Drive

A hard disk drive has 10 disks and 18 surfaces available for recording. Each surface is composed of 200 concentric tracks and the disks rotate at 7200 r.p.m. Each track is divided into 8 blocks of 256 32-bit words. There is one read/write head per surface and it is possible to read the 18 tracks of a given cylinder simultaneousl

Simulink Problems

1. Drive the system with a step input and display the output on a graph. Based on the graph, what is the settling time and percent overshoot? 2. Based on the response, what is the steady-state error and what is the expected steady-state error?

Moving average Chart of percent lime concentration.

Twenty-four hourly readings of the percent lime concentration are shown below Hour %CaO Hour %CaO 1 0.19 13 0.16 2 0.13 14 0.15 3 0.11 15 0.20 4 0.19 16 0.16 5 0.16 17 0.14 6 0.17 18 0.16 7 0.13 19 0.14 8 0.17 20 0.10 9 0.10 21 0.13 10 01.4 22 0.20 11 0.17 23 0.26 12 0.14 24 0.16 a) Use these 24 values to constru

Gain-frequency characteristics of a common operational amplifier

a) Determine the gain-frequency characteristics of a common operational amplifier. b) Calculate the cut off frequency of an op-amp having characteristics Avd - Large-signal differential voltage amplification = 20 B1 - Unity gain bandwidth = 1MHz c) Estimate the input offset voltage for the Multisim 741 model of f

Solve the following Inverse and Laplace transform problems.

Please show all the steps and working. 1. Complete the following inverse Laplace transforms: a) 1/(2s + 4) b) 5s/(16+s^2) c) 10/s^2 d) 4/(s-2)^2 + 16 e) (9s+ 23) /(s+2)(s+3) 2. Complete the following Laplace transforms: a) 20 b) 20sin(5t) c) 20exp(-5t) e) 20exp(-5t)cos(5t) f) 20t^2 Please see the attachment fo

absorption loss of shielding

A plane metal shield offers an absorption loss of 30 dB at a frequency of 10 kHz to normally incident radiated emission. (a) Determine the absorption loss at 10 kHz in a shield of five times the thickness. (b) Determine the absorption loss at 20 kHz in a shield of half the original thickness.

Laplace transform of a pulse

Consider computing the Laplace transform of a pulse: p(t) = {1 0 < t < 1 {0 otherwise a) use the integral formula to find P(s), the Laplace transform of p(t). Determine the region of convergence of P(s). b)Represent p(t) in terms of the unit-step function and use its Laplace transform and the time-shift p

Bandpass Sallen and Key

Design a bandpass filter of 'Sallen and Key' topology and having the following characteristics fo = 3.3 kHz, Q = 2.2. : Verify your design by means of a Bode plot.

First Order Filter to a Step Input.

A) FIGURE 2 shows the response of a first-order filter to a step input. Estimate the half-power cut-off frequency of the filter and sketch its frequency and phase response. B) Select (with justification) from the op-amps listed in TABLE A those which are NOT suitable for use as the active component in the filter of (a) above.

Laplace and Fourier transforms

Any causal signal x(t) having a Laplace transform with poles in the open-left s-plane (i.e., not including the j? axis) has, as we saw before, a region of convergence that includes the j? axis, and as such its Fourier transform can be found from its Laplace transform. Consider the following signals: x1(t) = e^-(2t) * u(t) X

Eigenfunctions and LTI systems

The eigenfunction property is only valid for LTI systems. Consider the cases of nonlinear and of time varying systems. a. A system represented by the following imput-output equation is nonlinear: y(t) = x^2(t) Let x(t) = e^(j*pi*t/4). Find the corresponding system output y(t). Does the eigenfunction property hold? Explain.

DSP related problems solved in Matlab

4 questions on signal processing are described. 1) Cosine and sine transform 2) Sampling output of nonlinear system 3) Causal systems and real-time processing 4) Z- transform properties and inverse transform

Quantize using MATLAB

This is what I have so far: EDU>> %Sampling, Quantizing, Coding EDU>> %Analog Signal EDU>> t= [0:0.025:1]; EDU>> %Sampled Signal EDU>> x= 0.8*cos(2*pi*t)+0.15; EDU>> Ts=0.025; n=length(t);n=0:N-1; EDU>> xs = 0.8*cos(2*pi*n*Ts); EDU>> hold on EDU>> plot (t,x); EDU>> hold on EDU>> %Quantized Signal EDU>> Q=2; EDU>>

Signal Processing

Signal Processing. The Z- Transform. See attachment Signal Processing. Inverse Z-transform and poles and zeros When finding the inverse Z-transform of functions with z^(-1) terms in the numerator, that fact that z^(-1) can be thought of as a delay operator can be used to simplify the computation. Consider. X(z)=(1-z^(-

Microwave line of sight link transmits signal a distance

(1) A microwave line of sight link transmits a 10.0 GHz signal a distance of 25 km across a river estuary. The transmitter delivers 2 W to the transmitting antenna. The antennas at each end of the link have a gain of 36 dB. The receiver has a noise bandwidth of 20 MHz with rms noise power of -120.0 dBW. The transmitter and

Calculating Path Loss, RF Power and Bit Rates

A microwave line of sight link transmits a 10.0 GHz signal a distance of 25 km across a river estuary. The transmitter delivers 2 W to the transmitting antenna. The antennas at each end of the link have a gain of 36 dB. The receiver has a noise bandwidth of 20 MHz with rms noise power of -120.0 dBW. The transmitter and receiver

Addition of heat and insulators

Explain the following terms; (i) critical radius of insulation. (ii) economic lagging thickness. An electric wire has a diameter of 1.3 mm and is to be covered with insulation 2.5 mm thick of thermal conductivity 0.35 W/mK. If the outside surface heat transfer coefficient is 15.0 W/m2K, calculate the critical radius of insul

Digital Speech and Video Compression

1. Name two techniques that are used to compress digital speech, and the resulting compressed speech bit rates. 2. Name two techniques used to compress digital video. Why is compression particularly important for the transmission of digital video signals? 3. What is the modulation used to transmit HDTV signals over the air

Music Signal Transmitted Over a Digital Radio Link

A music signal has a bandwidth of 50 Hz to 10 kHz. The signal is sampled, converted to a serial bit stream, transmitted over a digital radio link, and recovered as an analog signal at the receiver. a. What is the sampling rate for this signal if sampling occurs at 1.2 times the Nyquist rate? b. The ADC used at the transmit

Improving Memory Systems Reductions

Please provide a detailed step by step solution. An embedded application requires a certain level of overall performance and after the first design phase is completed, it is evident that the chosen processing system is inadequate and needed to achieve an overall improvement in speed of at least 20%. The designers then looked

Time varying capacitor

A time varying capacitor is characterized by the charge- voltage equation q(t) = C(t)v(t) That is, the capacitance is not a constant but a function of time. a) Given that i(t) = dq(t)/dt, find the voltage- current relation for this time varying capacitor. b) Let C(t) = 1 + cos (2Ï?t) and v(t) = cos (2Ï?t). Determine the cu

Op-Amp THS4021

FIGURE 2(a) shows the Bode plot of op-amp THS4021. The manufacturer describes this device as a ââ?¬Ë?decompensated op-ampââ?¬â?¢, by which is meant that the frequency compensation is partial as opposed to ââ?¬Ë?uncompensatedââ?¬â?¢ where no compensation is used at all. The advantages of ââ?¬Ë?decompensa

Analysis of TDMA satellite transmission system

This question uses part of the FDMA question that has also been assigned (#434455). The earth station in Question #1 transmits a digital data signal with a bit rate of 10 Mbps into a TDMA frame in a second transponder on the same GEO satellite. The transponder has a bandwidth of 36 MHz. The earth station modulation is

Why is a spreading code used in a CDMA radio system?

A terrestrial radio link transmits a CDMA signal from a base station using a spreading code with a chip rate of 1.0 Mchips per seconds. The message data rate of the signal is 10 kbps. a. Why is a spreading code used in a CDMA radio system? b. What is the coding gain of the correlator in a CDMA receiver when it is synchroni

SNR Ratio for Next Generation Transmission

You are required to determine that this next generation transmission system will require a spectral efficiency of 5 bits/sec per Hertz. In other words, the total capacity of your system, given in bits/sec, divided by the total channel bandwidth, given in HZ, must be 5. Determine the minimum signal to noise ratio in dB required f

Determining the Wavelength and Frequency

The downstream information (from the network to the customer) is transmitted at a wavelength of 1550 nanometers and the upstream information (from the customer to the network) is transmitted at a wavelength of 1310 nanometers. What is the separation in frequency between 1550 and 1310 nanometers?