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Electrical Engineering

Op am

Describe the operation and the characteristic of the general-purpose 741 op-amp provided in the attached file. i) Derive and calculate overall gain. ii) Determine the unity-gain bandwidth iii) Compare between BJT (741) op-amp and BiCMOS (CA3140) op-amp.

Ladder Logic Exercise

Please redraw the equivalent ladder logic diagram used to implement the hardwired circuit drawn in figure 5-48 (see attachment), wired using: a. A limit switch with a single NO contact connected to the PLC input module. b. A limit switch with a single NC contact connected to the PLC input module. Assuming the hardwired cir

Ethernet Switching

1. A user message is split into 15 frames, each of which has an 80% chance of arriving error-free. If no error control is used by the data link layer, how many times must the message be sent on the average to get the entire message through? 2. A communication channel has a bit rate of 14 kbps and an one-way propagation delay

Differential Amplifier Design

Please work the problem and explain how you found the necessary values. Thank you. Design a differential amplifier as shown in Figure 11.28 incorporating a basic two transistor current source to establish Iq. The bias voltages are V+=15V and V-=-15V, the transistor parameters are Beta=180 and Va=100V, and the maximum forwar

Mosfet Amplifiers

Hi, these are practice tests and I really need to learn how to do them. Could you please help me understand and solve the entire problem? Any part of the bottom of any graph cutoff is merely a horizontal line showing ground w/ nothing else.

Calculating voltage gain

In the operational amplifer circuit shown in the figure, the switch s is closed first. Open the switch s and calculate the voltage gain V0/Vi. Assume ideal Op-Amp. See attached

Systems and simulation - Matlab

Determine and use Matlab to plot y(t) for a 2nd order system with unity dc gain, and poles at -a and -b, where (i) a=b=1, and (ii) a = 1+j1 = b*

LET Z1 = (-1,-1) AND Z2= (1,1)

Let Z1 = (-1,-1) and Z2 = (1,1). Perform the operation Z1Z2. Use number pairs. a. Z1Z2 = (-2,0) b. Z1Z2 = (2,0) c. Z1Z2 = (0,-2) d. Z1Z2 = (0,2)


Let Z1 = (-1,-1) and Z2 = (1,1). Perform the operation Z1 and Z2. Use number pairs. a Z1 + Z2 = (-4,0) b Z1 + Z2 = (0,4) c Z1 + Z2 = (0,0) d Z1 + Z2 = (0,2)

Telecommunications System

A unit for a telecommunications system is to be designed so as to have a minimum availability of 0.9994. The MTTR (mean time to repair) for the unit is estimated to be 24 hours. The unit is to consist of (n) effectively identical elements in parallel, from a reliability point of view. If the hazard rate of each of the elements i

Spring-Mass-Dashpot System Simulation

The attached graphs show simulated compression vs time for a spring-mass-dashpot system described by P(s) = 1/[s^2 + (B/m)s + k/m]. Parameters B, m, and k were each varied in turn with the other two held constant. Identify which parameter was varied in each graph, and whether it was increased or decreased from curve (a) to (d) i

Operational Amplifier

An operational amplifier (Op-Amp) circuit is built to measure the temperature of an exothermic process in a lab. The circuit uses a thermistor (Resistance Temperature Detector) to monitor the target temperature and a voltmeter to measure the output voltage of the Op-Amp ciruit. Since the thermistor is a passive device, it requ

Why can discrete-time FIR digital filters be made exactly linear phase ?

Why can discrete-time FIR digital filters be made exactly linear phase, whereas IIR digital filters cannot? I only require a sentence describing why - not any derivations of formulas etc!!!. I know what makes a filter exactly linear phase (impulse response must be symmetrical), but i don't know why IIR filters cannot be m

Comunication technology

I was wondering if you can please help me with the solution to the following questions. 1a. When a square wave with a fundamental frequency of 2khz and amplitude 5v and comprised of up to five odd harmonic (each successive odd harmonic having half the amplitude of its predecessor) is passed though a standard telephone line o

Systems and Simulation

//\ / Use the Explicit Modified Euler method to calculate x(h) if h = 0.2, x(0) = 1, and x(t) = (-x^2)(t) - 1. The single hat is used to denote the first estimate of a x value and a double hat is used to d

FIR - High pass filter problem - a similar example is included.

This is one of the two DSP problems I posted earlier. I just solved the other one..this one is giving me a lot of grief. There is a similar problem with given solution included to be followed by the problem itselt. I've also noted the differences between the sample and the the actual problem (high pass vs. low pass, cutoff vs.

Node Admittance Equations

For the attached diagram, write, but do not solve, the node admittance equations in matrix form for the network. W = 2 rad. /second. Treat the network as a three-node network.

BJT AC/DC loadline analysis

The problem says to Find Icq, Vceq; plot dc and ac loadlines, calculate the small signal voltage gain, then determine the input and output resistances (Rib and Ro). Beta=120. Va=infinity.

Partial fraction expansion

We have a function (see Attachment). Using a partial fraction expansion of Y(s) find Y(z) when T=0.2 seconds.

Magnetically suspended steel ball

A magnetically suspended steel ball can be described by the linear equation as shown in the attachment. The state variables are x1 = position, and x2 = velocity, and both are measurable. Select a feedback format so that the system is critically damped and the settling time (2% criterion) is 2 seconds. Solve for k1 and k2.

Full Wave Center Tap Bridge Rectifier

In the attached image, how is VDC across the load resistor found? The practice test has an answer of 28.24 ignoring the ripple voltage. VDC across the resister is Vout right? So, Vsecondary - the voltage drop in the diode = Vout = VDC So, if the secondary winding has 40voltage - .7V drop in the top resistor, that's 39.3V

Digital signal processing problem

The problem(2-61) is from the third edition of digital signal processing(proakis+manolakis) 2-61 an audio signal s(t)generated by a loud speaker is reflected at two different walls with reflection coefficients r1 and r2. the signal x(t) recorded by amicrophone close to the loud speaker, after sampling is;