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a. The highest frequency in the spectrum X (ω) (Fig. P8.1-8a) of a bandpass signal x (t) is 30 Hz. Hence, the minimum sampling frequency needed to sample x (t) is 60 Hz. Show the spectrum of the signal sampled at a rate of 60 Hz. Can you reconstruct x (t) from these samples? How?
b. A certain busy student looks at X (ω), concludes that its bandwidth is really 10 Hz, and decides that the sampling rate 20 Hz is adequate for sampling x (t). Sketch the spectrum of the signal sampled at a rate of 20 Hz. Can she reconstruct x (t) from these samples?
c. The same student, using the same reasoning, looks at Y (ω) in Fig. P8.1-8b, the spectrum of another bandpass signal y (t), and concludes that she can use sampling rate of 20 Hz to sample y (t). Sketch the spectrum of the signal y (t) sampled at a rate of 20 Hz. Can she reconstruct y (t) from these samples?
A parallel circuit contains four branches with resistors values of 4.7k, 5.6k, 8.1k and 10k. Which branch has the largest current flow
Make sure to mark significant points in your figure (amplitude, offset, time, etc.). How could a device be modified to work as an electro-optic phase modulator? If we apply signal V, what is the range of phase shifts induced by this modulator.
Identify a figure of merit for a transconduc-tance amplifier like that suggested in Problem 1.26 above for a current amplifier. Use this to rank the three as transconductance amplifiers.
Each time you apply a theorem or law of boolean algrebra, mark your paper clearly to indicate which terms were used to add or delete other terms, or indicate which terms were combined. Simplify algebraically
Given a silicon diode with a reverse current of 5 a at 25°C and 100 μA at 100°C, calculate the surface leakage current.
What is a Solenoid and Solenoid Magnetic Field ?
Discuss the potential for this electronic device to reduce bias in the Nielsen ratings. Are they any new problems that might be caused by this device?
Given a char variable called gender, write C++ statements to output "Male" if gender contains upper or lower case M, "Female" if it contains upper or lower case F, or "Invalid Gender" if it contains anything else. Use if / else if statements.
design an excess-2 code inverters( in excess-2 code 0 isrepresented by0010,1 is represented by 0011, 2 is represented by0100 etc) . the four inputs to the converter circuit (A,B,C,D)represent an excess-2 code decimal digit.
A circular disk having a radius of 4 ft and weighing 40lb has a small weight of 20lb attached to it at a distance of 2ft from its center. If the disk is in the vertical plane and set in rotation about an axis through its center so that its minimum..
The Karnaugh map is a structured way to simplify a Boolean expression. Its main advantage is that it can always reduce an expression to its simplest SOP form. What does the final logic expression indicate?
what is the maximum number of carrier frequencies that would ever be needed so that any arbitrarily partitioned region would never have two adjoining cells that use the same frequency
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