TABLE OF CONTENTS D.A. Burt and K.D. Baker
Department of Electrical Engineering
Utah State University, Logan, Utah
In a communications or measurement situation, any signal disturbance other than the desired signal is termed interference. These extraneous signals, which hinder the measurement of the desired signals, assume a variety of forms and can find many devious ways of getting into or out of electronic equipment. This chapter is devoted to describing these unwanted conditions and means of reducing or eliminating their effects.
atmospheric noise or interference Radio-wave disturbances originating in the atmosphere, principally because of lightning discharges, also called atmospheric or simply sferics.
common-mode Interference Conducted interference caused by voltage drops across wires (usually grounds) common to two circuits or systems.
conducted interference Interference caused by direct coupling of extraneous signals through wires, components, etc.
cosmic noise Interference caused by radio waves emanating from extraterrestrial sources.
coupling The transfer of power between two or more circuits or systems.
crosstalk Electrical disturbances in one circuit as a result of coupling with other circuits.
electromagnetic interference (EMI) A general term for electrical interference throughout the frequency spectrum from subaudio up to microwave frequencies.
electrostatic induction Signals coupled to the measuring circuit through stray capacitances, also commonly called capacitive pickup.
hum Electrical disturbance at the ac power-supply frequency or harmonics thereof.
impulse noise Noise generated in a discrete energy burst...
