Noise reduction on interconnect lines

Abstract

This paper is concerned with the electrical "noise" on interconnect lines, particularly as applicable to analog equipment. The discussion summarizes the effects of magnetic, electric, and electromagnetic fields. Also considered are common impedances and ground loops in producing electrical interference on analog circuits.

The use of lines of low susceptibility is discussed together with the effects obtainable by suitable shielding. Circuits known to have been used are illustrated and their characteristics discussed.

Proper system grounding is emphasized as is the fact that interference control is obtained only by the system approach.

The paper should serve as a reminder that elec trical interference is minimized through the prin ciples of good wiring practice, separation, and proper attention to the circuit details during design and fabrication.