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A balanced amplifier circuit is shown below. The two amplifiers are identical, each with power gain G and noise figure F. The two quadrature hybrids are also identical, with an insertion loss from the input to either output of L > 1 (not including the 3 dB power division factor). Derive an expression for the overall noise figure of the balanced amplifier. What does this result reduce to when the hybrids are lossless?
A uniformly doped n-type silicon bar doped ND =1016/cm3 of length L is illuminated to create1011/cm3 excess electron-hole pairs at x=0.The illumination wavelength does not allow the light to penetrateinto the interior (x>0) of the bar.
1. Draw a circuit that can scale the voltage from the range of 0~200 mV to the range of 0 ~ 10V. 2. Draw a circuit that can scale the voltage from the range of -200 mV ~0 V to the range of 0 ~ 10V . 3. Draw a circuit that can scale the voltage from t..
Determine whether the follow signals are period and for those that are find the fundamental period. F: x(t) = cos(t)u(t) G: x(t) = v(t) + v(-t) where v(t) = cos(t)u(t) I: x[n] = cos((1/5)(pi)(n)) * sin((1/3)(pi)(n))
A rectangular strain gage rosette attached to an aluminumsurface comprises three identical gages (gage factor = 2.1) ofnominal resistance 200 ohms are each connected into a Wheat stonebridge having 3 other resistance values also of 200 ohms.
An amplifier has an input signal, VIn = 250 V. The output voltage, VOut = 30 mV. What is the gain in dB for the amplifier at that frequency
Consider a 4-PAM system with Gray mapping. Evaluate the exact bit error probability. Hint: Consider the bit error probability for the first and second bit separately, and then average over the two bit error probabilities. To find the error probab..
The loop rotates in the external magnetic field of strength .35 T at a constant frequency of 59.7 Hz.
A three phase motor draws 20kva at 0.7 lagging power factor from a 240 V source. Determine the kVAR rating of the capacitors to make the combined power factor 0.9 lagging and determine the line current before and after the capacitors are added.
Size reduction, enhancement of capabilities, reduction of power consumption, and increasing the speeds of electronic devices, as well as their microcontrollers, have been the trend since the invention of the integrated circuit by Jack Kilby at Tex..
Why does search in game-playing programs always proceed forward from the current position rather than backward from the goal
(a) Find and sketch the spectrum of the information signal. What is the bandwidth of the information signal (choose an appropriatedefinition for the bandwidth in each case) (b) Write a time-domain expression for the modulated carrier.Include all kn..
a. calculate n and p using theexact solutions found above at T = 200K, 300K, 500K and 700K. b. calculate n and p using theapproximate solutions given in the lecture at T = 200K, 300K, 500K,and 700K. c. Using MATLAB draw n and p-vs- T in both cases a)..
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