Table of ContentsNoise and Noise Figure Measurement Plan of Attack Thermal Noise Noisy Resistor Normalized Power Shows “How Much” Noise Normalized Power Spectrum of Thermal Noise Shot Noise Shot Noise Power Spectrum White Noise A Noisy Circuit: Two Resistors Adding the Noise Voltages The Power Spectra Add Generalization: A Passive Circuit Active Circuit Available Power Available Power Spectrum At Room Temperature Filtering Noise Noise Power Filtering White Noise Example: Low-Pass Filter The Output Noise Power Depends on the Bandwidth White Noise of Increasing Bandwidth Some Illustrative Numbers Continuing the Numbers... Characterizing Two-Ports A Noisy Two-Port Device Defining Noise Figure The Definition Requires a Room-Temperature Source Cascade of Two-Port Devices Overall Noise Figure Cascade Example Example, continued... Example, continued... Example, concluded Input Signal-to-Noise Ratio Output Signal-to-Noise Ratio Lossy Two-Port Lossy Line Example Lossy Line Example, continued Lossy Line, continued... Lossy Line, concluded Measurement of Noise Figure Noise Sources Excess Noise Ratio Example Calculation of Noise Figure Calculation, continued... Example of Noise Figure Measurement Example, continued... Example, concluded Example: Dynamic Range of an Optical Data Link An Optical Data Link Measured Gain Compression Setup for Noise Figure Measurement Measured Noise Figure Minimum Detectable Signal Calculation Compression Dynamic Range A Caveat Caveat, continued... Caveat, concluded Summary Summary, continued... Summary, concluded PPT Slide |
Author: Bruce A Black
Email: bruce.a.black@ieee.org Home Page: http://www.rose-hulman.edu/~black |