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1. What is the difference between discrete system and digital system?2. What is "baseband modulation"? What types of baseband modulation are there?3. How does time division multiplexing work? What factors affect how many channels you can transmit?4. What does "sample and hold" block do in PAM? How do you choose the frequency of pulse generator and sine wave and why?5. Which is the theoretically optimal waveform for pulse shaping? Why?6. What types of keying systems do you know? (Names + description for each)7. What is the spectrum of ASK signal and why?8. What is the function of raised cosine filters in our experiments? How does it affect the signal in both time domain and frequency domain?9. What is Frequency Shift Keying? What is the difference from FM?10. Write the expression of FSK. Use an example to explain FSK if information symbol is 2 bits. And what does the spectrum of the modulated signal look like?11. In a digital system, how does the number of bits affect the transmission speed? What is the compromise involved?12. What is the role of the integrator in the FSK implementation comparing to clock? How is the signal affected in time and frequency?13. How many constants do we use in FSK? What parts of the FSK expression do they correspond to?14. Give the basic structure of the PLL.15. What are two easy implementations for the phase comparator? Briefly explain how one of them works.16. How to make PLL work as an FM modulator?17. Briefly design a PSK modulator with necessary blocks and explain your design.
a DC motor turns at a speed of 1460 rpm and produces an output torque of 3.0Nm. The DC voltage applied to the motor is 100V and a current of 5.1A flows through the motor. A. What is the efficiency of the motor
Assume X is normally distributed with a mean of 5 and a standard deviation of 4. Determine the value for x that solves each of the following: (a) P(X > x) = 0.5 (b) P(X
very useful not only in obtaining the rectangular and polar forms of complex numbers
If power Ps=10W, power gain factor G1=150, and power gain G2=14 dB, find the maximum value of LdB (path loss in dB) such that the power delivered to the resistor is -85 dBm.
Construction of different types of power transformer, significant energy savings
Design a circuit that takes the output from each of the five microphones your band uses and adds the voltage to create a single voltage signal which is fed to the amplifer. Except not all voltages should be equaly amplified.
The basic sampling rate for the compact disc (CD) recording industry has been set at 44.1 kHz. (a) Determine the highest frequency of the analog signal that could theoretically be reconstructed from this sampling rate.
A meter being used for a 2-wire resistance measurement has an internal current source of 1 mA. If the meter's test leads have equal resistances of 0.06-ohm, what is the measured resistance for: A resistor of actual value 0.5-ohm
1) Determine the transfer of second-order highpass filter with a cutoff frequency of 900 Hz and passband gain of 1 using a butterworth type. 2) Design a filter for your transfer function from question.1 using the sallen-Key topology.
what are the advantages and disadvantages of using PLDs, including FPGAs, as compared to using discreet logic-integrated circuit chips
Build a home security system circuit using this program. The system must include a door sensor,window sensor, smoke detector, water leak sensor, a motion detector.
Create a non-inverting op amp circuit to obtain Vout = 12 V if R2 (RF) = 1100k-ohm and Vin =1V . Open up the attributes window of the op amp (click on the op amp symbol) and verify that VPOS = +15V and VNEG = -15V. Do not change any other attribut..
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