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A design is required of a voltage amplifier to operate between a I MD source and a 100 Cl load. You have two amplifiers, each with a gain 10 VAr, but with the input and output resistances of A t being I Mil and 10 kΩ, respectively, and of A2 being 10 kΩ and 100 Cl, respectively. There are two possible ways to connect the two amplifiers between the source and load. Which is best? What is the highest overall gain? Contrast this with the gain using only one amplifier at a time? If a good fairy granted you one wish - to double (or halve) any one property of either amplifier - is there a best choice to be made? Why?
The duration of a cellular call is an exponential random variable with expected value of 3 minutes. A subscriber makes 120 calls each month. Use the central limit theorem to estimate the probability that the subscriber uses at least 400 minutes.
Determine the capacitance as a function of Ri and Ro. If the dielectric is polystyrene of relative permittivity, εr = 2.6, calculate the capacitance of an isolated conducting sphere of a radius 0.4cm(i.e., Ri=0.4cm and Ro goes to infinity).
The following functions describe the oscillations in electric circuits and the vibrations of machines and structures. Plot these functions on the same plot. Because they are similar decide how best to plot and label them to avoid confusion.
Assume that the memory locations M[$20], M[$21] and M[$22]. Write a 68HC11 assembly language program (with lots of comments) that will determine the sum of the largest two numbers and store its value in M[$23].
steady-state response, when it is excited by x(n) = u(n). What is its unit impulse response h(n)?
Laplace transform of a pulse, Consider computing the Laplace transform of a pulse: use the integral formula to find P(s)
1. Write this as a Boolean expression in canonical minterm form 2. Rewrite the expression in canonical maxterm form 3. Write the complement of f in 'little m' notation and as a canonical minterm expression
a). If the 8th bit is set to0, what is the minimum Hamming distance between the 8-bit ASCII character code words b). If the 8th bit is usedfor parity, what is the minimum Hamming distance between the 8-bitASCII character code words
Only one of the following circuits is connected correctly. Identify which is the correct circuit and explain what is wrong with the other two.
Design a DC motor control system to run the 48V DC motor at 40rpm up to max load of the motor
For a transformer with a line voltage of 34.5 KV on the primary and a line voltafe of 480V. Calculate Vphase primary and secondary,P,Q, and S for each of the following transformer connections and loads.
The address field of the instruction (stored at W + 1) is designated by the symbol Y. The operand used during the execution of the instruction is stored at the effective address symbolized by Z. An index register contains the value X.
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