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A fair 6-sided die was tossed in a fair way 5 times. a. What's the probability of getting the sequence of outcomes 1, not 1, 2, not 2, 3? b. What's the probability of getting exactly two 6's in the sequence of 5 tosses? c. What's the probability of the 5th roll being the first roll yielding either a 3 or a 4?
Transmitting data at higher speeds generally requires a wider bandwidth, which is not always possible within FCC guidelines. In addition to the wider bandwidth, higher speed transmission also requires a higher transmit power. Why
A DSSS-CDMA signal has a chip sequence that is 1,000 chips in length. The sequence repeats every millisecond. Define DSSS-CDMA Chip Sequence
An unknown semiconductor has a bandgap of 1.1eV and Nc = Nv. It is doped with 10^15 cm-3 donors where the donors fully ionized. Given that EF is 0.25 eV below Ec, calculate the concentration of electrons and holes in the semiconductor at 300 K and..
The input analog signal is bandlimited to 3900 Hz. The overall frequency response is required to satisfy the following: Gain > -1.33 dB for frequencies less than 1, 333.33 Hz Gain
If you have 16 kibibytes of memory plus a few (less than 10) memory mapped devices (assume that each device uses 16 bytes of address space), what should the address size be
A baseband signal has frequency components from 5 kHz to 15 kHz. Determine (a) the theoretical minimum sampling rate and (b) the maximum time interval between successive samples.
Using the message signal m(t) = 1/(1+t^2) , determine and sketch the modulated signals for the following methods of modulation: (c) SSB modulation with only the upper sideband transmitted. (d) SSB modulation with only the lower sideband transmitted.
Using 4-bit numbers to save space, multiply 3ten x 4ten in binary.
(a) A Ge bar 0.1 cm long and 100 m2 in cross-sectional area is doped with 1×1017 cm-3 gallium. Find the current at 300 K with 10 V applied. (b) Upon a steady illumination uniform excess carriers are generated in the Ge bar.
write an 8051 program that would generate a 200khz, 50% duty cycle, square wave at P1.0.Use Timer 0 for the delay. Ignore the overheads cycles due to the instructions in the loop. Assume 12 MHz clock. All data must be hex.
Consider a direct sequence spread spectrum (DSSS) system attempting to transfer data. The DSSS system has a data rate of 2 Kbps (2 thousand bits/sec) which is spread to 2 Mcps
Using a shorted stub to match load, what is the lenght of the line where the normalized input Y is 1 + jb . If the characteristic impedance of the shorted line is 40 ohms, what is the length of the stub length.
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