In the course of previous sneak circuit analyses, some situations responsible
for sneak conditions have been discussed. These situations have been summarized
in the form of clues and tabulated in checklists. When used by the analyst,
these checklists can greatly increase the level of confidence in a sneak
Clues regarding sneak situations are of two basic types:
disclosed by the topographic pattern
Clues related to piece-parts and
As noted in the main text, the sneak analysis also provides collateral
benefits in identifying design problems that are not sneak-related. Tabulations
of clues that assist in this type of activity have also been developed.
In this appendix, examples of each of these kinds of clues are presented.
Section 2.0 tabulates a set of Tree Topograph clues; a listing of piece-part and
circuit configuration clues for detecting both sneak conditions and design
concerns is presented in Section 3.0; and a set of design-concern clues arranged
generally by the effect on the circuit is included in Section 4.0.
These checklists are not necessarily exhaustive; however, they do indicate
the nature of the items the analyst should consider.