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NOISE

Registor noise is called white noise when, probability density function PDF is gaussian.

Registor noise is called white noise when, power spectral density PSD is constant.

SHOT NOISE is generated by active devices only.

Transit time noise is effective at high frequencies above 1 THz.

Noise is measured by a.c voltmeter.

Thermal noise power is independent of resistance of the n/w.

PSD of white noise is independent of freguency.

if narrow band noise is gaussian, then its in- phase component and quadrature component are jointly gaussian.

Equivalent noise B.W may be defined as the B.W of an ideal bandpass system which produces the same noise power as the actual system does.