AN_347_sheilding and guardingANALOG DEVICES ONE TECHNOLOGY WAY P.O. BOX 9106 AN-347 APPLICATION NOTE NORWOOD, MASSACHUSErrS 02062-9106 6171329-4700 Shielding and Guarding How to Exclude Interference-TypeNoise What to Do and Why to Do It - A Rational Approach by Alan Rich This is the second of two articles dealing with interference noise. In the last issue of Analog Dialogue (Vol. 16, No. 3, pp. 16-19), we discussed the nature of interference, described the relationship between sources, coupling channels, and receivers, and considered means of combatting interference in systems by reducing or eliminating one of those three elements. One of the means of reducing noise coupling is shielding. Our purpose in this article is to describe the correct uses of shielding to reduce noise. The major topics we will discuss includ……