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Write the code for an m-file (script) that will be used to generate a DSB signal, an AM signal derived from the DSB signal, and a down-converted AM signal. The specifications for the simulation are:
Modulating Frequency = 1kHz, Initial Center Frequency = 30kHz, Final Center Frequency = 20kHz, Time Vector:3001 points over range from 0 to 3 ms (3 cycles at the modulating frequency).
1. Generate a DSB signal based on the modulating frequency, the initial center frequency, and amplitudes of 1.
2. Add the carrier to the DSB signal and set the modulation to 75% for the AM signal.
3. Provide an ideal mixing operation with a 10-kHz local oscillator having an amplitude of 2, and eliminate the undesired component by using a band-pass filter centered at 20kHz. The bandwidth should be sufficient to pass the shifted AM signal. A reasonable choice would be to set 3-dB points at 18.5 and 21.5kHz.
Plot the steady state torque-speed characteristic for Va = 100V, 60V, and 30V. Calculate the armature voltage to be applied in the steady state at the speed of 1500 rpm when the motor torque load require is 3 Nm.
Design lowpass IIR filter with the following specifications: Filter order = 2, Butterworth type Cut-off frequency=800 Hz Sampling rate =8000 Hz Design using the bilinear z-transform design method
Design a m-seguence PN generator using 3 shift registers. Show design procedure circuit and PN sequence and find 16 Walsh codes for modulating (encoding) a 4-bit data packet
computation with 5% of the code that cannot be paralleled, compute the speedup and efficiency.
A computer has 16-bit instructions and 64 registers. Suppose it is required to have at least 14 instructions designed to have 2 operands from registers (e.g., add, $1, $3 puts the sum of $1 and $3 into $1.
An incandescent light bulb can be modeled as a resistor with a value of a few ohms. Imagine an incandescent light bulb goes out in your house. Using your trusty multimeter, how would you check if the bulb is bad and needs replacing
Show how to build each of the following single- or multiple-output logic functions using one or more 74X138 or 74X139 binary decoders and NAND gates. (hint: Each realization should be equivalent to a sum of minterms)
State Carson's rule for bandwidth estimation. What does it reduce to for NBFM and WBFM and d erive an time domain expressionfor the output xd(t) of the system
encounter a sequence of birds while walking in the park. The birds can either be blue (B) or red (R). We let X be the random variable corresponding to the number of birds we encounter until seeing the first blue one.
Calculate the probability of drawing 3 10 k resistors from a box of 500 resistors, where 495 are 100 k resistors and 5 are 10 k . Use your results from part (a) and (e) to find this probability. How many ways are there to draw 3 resistors from a bo..
From your group, pick 3 mobile phones, and/or portable devices that are rechargeable. Estimate (using resources and available data), how much electricity that is used to charge them on a weekly basis
An LVDT is used in an accelerometer to measure seismic-mass displacement. The LvDT and signal-conditioning output is 0.31 mV/mm with a +/-2 cm maximum core displacement. The spring constant is 240 N/m, and the core mass is 0.05 kg.
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