ECE :: Exam Questions Paper
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The ratio of the diffusion coefficient in a semiconductor has the units
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Consider the probability density f(x) = ae-b|x| where x is a random variable whose allowable values range from x = - ∞ to x = + ∞. P(1 ≤ x ≤ 2)
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The amplitude of a pair of composite sinusoidal signal y(n) = x1(n) + x2(n) with x1(n) = sin (5pn) x2(n) = 3 sin (5pn) is __________ .
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The amplifier circuit shown below uses a silicon transistor. The capacitors Cc and CE can be assumed to be short at signal frequency and the effect of output resistance r0 can be ignored. If CE is disconnected from the circuit, which one of the following statements is TRUE?
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A n-channel JFET has IDSS = 2 mA, Gate to source voltage VGS = - 2 V and trans-conductance is 0.5 mW then pinch-off voltage is __________ .
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ae-b|x|dx
apply 
aebxdx + 
ae-bxdx, 
= 
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A.
The input resistance Ri increases and the magnitude of voltage gain Av decreases
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B.
The input resistance Ri decreases and the magnitude of voltage gain Av decreases
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C.
Both input resistance Ri and the magnitude of voltage gain Av decrease
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D.
Both input resistance Ri and the magnitude of voltage gain Av increase
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= - 8VP - 16