6. When evaluating a signal, selecting a sampling rate that’s much lower than th
ID: 2249755 • Letter: 6
Question
6. When evaluating a signal, selecting a sampling rate that’s much lower than the signal’s frequency results in A. very low error. C. minimal bandwidth error. B. undersampling. D. a Fourier representation. 7. To obtain an indication of the value of noise that’s generated by a transistor, you should A. insert two diodes into a circuit to simulate the transistor’s junctions. B. calculate the noise using Friiss’s formula. C. use the manufacturer’s data sheets. D. calculate the noise as a function of resistor combinations
Explanation / Answer
6. Undersampling. For proper sampling and perfect reconstruction, signal should be sampled at the rate greater than or equal to the maximum freqncy of signal needs to be sampled.
7.Friss formula calculation. This gives evaluation of noise of amplifiers in terms of noise figure which makes evaluation of noise simple
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