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The noise figure of a microwave receiver front-end is measured using the Y -factor method. A noise source having an ENR of 22 dB, and a liquid nitrogen cold load (77 K) are used, resulting in a measured Y -factor ratio of 15.83 dB. What is the noise figure of the receiver?
Consider a myelinated fiber in which th nodes of Ranvier are spaced every 2mm. The resistance of the axoplasm per unit length is r(initial) = 1.4x10^10 omega/m. The nodal capacitance is about 1.5x10^-12 F.
Three-phase transformers are grouped according to the phase shift between their primary and secondary phase voltages. Discuss the transformer classification adopted by the standards and elucidate the terminology used for describing various transfo..
Find the impulse response fpr the filter? How many nonzero terms does the impulse response contain?
A non inverting op-amp circuit with a gain of 96 V/V is found to have a 3-dB frequency of 8 kHz. For a particular system application, a bandwidth of 24 kHz is required. What is the highest gain available under these conditions
a laser diode has a threshold current of 12 ma and emits at 3 mwma rate. a diode current of 15 5sin omegat ma
A separately excited DC generator rated at 125V has an armature resistance of 0.75 ohms and a no load coltage of 140 VDC. What will the armature voltage will be at rated load
A 2.5 meter long elastic cord is fixed at both ends. a) If the cord is vibrated at a frequency of 35-Hz, a n=3 standing wave is produced. with what speed do waves travel across the cord.
What is Average value in AC circuit?
a certain radio frequency generator delivers a power level of 12 dBm. If this signal is amplified, calculate how many decibels of gain is required to produce a power of 20 dBm.
Signal w(t) is input to the filter. This signal is white noise, with PSD = N0/2. If we denote the filter output as n(t), what is the power in n(t) We input v(t) + w(t) into the filter, where v(t) = Ac cos(2pif0t). If Ac=4, what is the output signal..
A temparature sensitive transducer is subjected to a sudden temparature change. it taken 10 seconds for the transducer to reach equilibrium condition ( five time constants ). the time taken by the transducer to read half of the temparature difference..
1. micro-hydropower. you have a cabin in the colorado wilderness far away from civilization and want to install a
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