5-Noise Analysis

# 5-Noise Analysis - PRINCIPLES OF COMMUNICATIONS 5 NOISE...

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PRINCIPLES OF COMMUNICATIONS 5 NOISE ANALYSIS

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NOISE POWER Where: N Noise power in watts k – Boltzmann’s constant = T absolute temperature in Kelvin B bandwidth in hertz (Hz) K J / 10 38 . 1 23 kTB N
NOISE VOLTAGE The maximum amount of noise power (or any power) transfers from source to the load circuit when the source resistance and the circuit resistance are equal. kTBR V N 4

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EQUIVALENT NOISE RESISTANCE Equivalent nose resistance (R EQ ) the value of a fictitious resistor that would produce the noise value (rms voltage) that was measured.
EQUIVALENT NOISE RESISTANCE IN CASCADED SYSTEM Where: R E1 total resistance at the input of the 1 st stage R E2 total resistance at the input of the 2 nd stage Where: V N is the total noise voltage at the input of the system

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EQUIVALENT NOISE TEMPERATURE
NOISE RESISTANCE AND NOISE FIGURE Where R’ eq is the reflected noise resistance of the succeeding stages, not including R t or the input impedance of the first stage.

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NOISE TEMPERATURE AND NOISE FIGURE
ATTENUATORS

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NOISE IN CASCADED SYSTEMS
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## This note was uploaded on 07/22/2011 for the course ECON 101 taught by Professor Dunst during the Spring '08 term at Alabama.

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5-Noise Analysis - PRINCIPLES OF COMMUNICATIONS 5 NOISE...

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