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    Electrical Engineering

    Maximum Message Bandwidth and Output Signal

    A PCM system uses a uniform quantizer followed by a 7-bit binary encoder. The bit rate of the system is equal to 50 megabits per second. a) What is the maximum message bandwidth for which the system operates satisfactorily? b) Determine the output signal to quantizing noise ratio when a full-load sinusoidal modulating wave

    Impedance and Frequencies

    In the circuit shown in Figure P6.9 (in the attached file), if L = 190 mH R1 = 2.3 kΩ R2 = 1.1 kΩ C = 55 nF a) Determine how the input impedance behaves at extremely high or low frequencies. b) Find an expression for the input impedance in the form (see attached file) c) Determine the four frequencies at which f1(w) =

    Phasor Techniques

    Using phasor techniques, solve for i in the circuit shown in Figure P4.53 (see attached file).

    Discussion of Programming Logic

    Can you confirm the following statement? 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 logic high level and the other input at low logic level. What is the output of the "EXCLUSIVE OR" gate? I say 0 would be the output...am I correct?

    Logic Circuit Expression

    Please provide some help with this question. Find the expression for the output, C, of the logic circuit shown in the following figure:'. See attached file.

    Magnitude of Impedience

    See attached dwg. Can you please show me how to find the magnitude of Z (The impedience "looking in") as a function of frequency from 10Hz to 100KHZ? Note the inductor is 1mH the resistor 100 Ohms and the cap 1uF.

    Resisitive Load

    A 4:1 step down transformer uses a 60Vac source on the primary windings. There is 120mA flowing through the load resistance on the secondary windings. What is the resisitive load?

    Saturated Npn Transistor and Current

    A saturated npn transistor has a base to emitter-applied voltage of 0.6V. The collector to emitter voltage is 0.2V. The collector current is 12mA. The beta value of the transistor is 30. What is the emitter current?

    Convolution calculation

    Please see the attached file for the full problem. W[n] = 2u[n] - 4u[n-2] + 2u[n-4], v[n] = sin[2πn/4]u[n] Calculate the exact answer by convolution w[n]*v[n]

    Electromagnetic problems

    Please see the attached file for the full problems: 1) A 2µC point charge is located at A(4,3,5) in free space. i) Find Eρ, Eφ, and Ez at P(8,12,2). 2) A charge Qo located at the origin in free space produces a field for which Ez = 1kV/m at point P(-2,1,-1). i) Find Qo ii ) Find E at M(1,6,5

    Smith chart application to a single stub tuner

    1) A normalized load admittance of (0.2 + j0.2) needs a single stub tuner. i) how far down the line should it be located? ii) what is normalized admittance at the point just to right of where stub should be attached? 2) A certain point along a transmission line the normalized admittance is (1+j1.5) i) Design the sho

    Input-output difference equation and impulse response

    Two discrete time systems are connected in series. Their input-output difference equations are: T1[.]: w[k] = 0.25x[k-2] and T2[.]: y[k] = 0.5w[k-1] + 0.5w[k-2] Determine the overall input-output difference equation relating y[k] to x[k] and determine the impulse response of the overall system using convolution.

    Node Analysis in MATLAB

    Use nodal analysis to determine the node voltages and also the branch currents of the circuit as shown in Fig.3.2. Use Matlab to calculate these values. Enter these readings in Table 2 under the 'calculated' column. (Note: Node voltage VA is known, that is, 10 V. So you need to write nodal equations at B and C only for the circu

    Loop equations and Laplace transformation

    Refer to attached circuit diagram. a) Write the loop equations for the circuit. b) Take Laplace transform of the equations c) Solve for the current through the 5 ohm resistor.

    Wheatstone Bridge

    Find equivalent resistance of circuit (see attachment) by using the Tee-Pi conversion. See attached file for full problem description.

    Finding Resistance and Voltage in a Simple Circuit

    In the circuit of Figure 2.17 (see attached file), if v1=v/4 and the power delivered by the source is 40 mW, find R, v, v1, and i. Given: R1=kilo-ohms, R2=10 kilo-ohms, and R3=12 kilo-ohms. Please show your steps. Thanks.

    Voltage across Wheatstone Bridge

    Derive the formula to find the voltage across the terminals AB of a Wheatstone Bridge as shown in Fig.1.2 (see attached file) and then calculate the actual value with the components as shown. See attached file for full problem description.

    Resistor Transfer Characteristics

    Write a Matlab script to plot the transfer characteristics of a resistor as shown in Fig. 1.1 (step 10) with V=1V and R=1kΩ. (Use these commands, R=1000; V=[0: 0.1:1]; I=V/R; plot(V-I)). Are these graphs identical? See attached file for full problem description.

    Find the Drain Voltage

    See attached .Can yo show me how to find the value of R to obtain the drain current Id=.4mA. Also find the drain voltage VD.The NMOS transistor has a Vt=2V (See attached file for full problem description).

    Plotting a root locus

    Plot the root locus for the following system (see attachment) as the feedback gain is varied from (see attachment).

    Stability of Linear Systems

    Design a proportional and integral controller, G= k_p ((a+1/T_1)/s) for the plant, P = 1/((X+1)(S+3)) to have dominant poled with (see attachment) i) Use rough sketches of the root locus to determine the location of the controller zero (i.e. find T_1) ii) Calculate the required controller gain Kp, (An accurate root lo