Sneak Paths in X-Y Matrix Arrays

In this paper, an equivalent circuit of an image sensor matrix is derived for a general array containing r rows and c columns. The circuit is useful in determining the "sneak paths" that exist, the amount of element isolation required, and/or the maximum array size possible for a given design. The various sneak paths that exist and general methods to minimize them are discussed. The matrix element employed is a photoconductor in series with a p-n junction diode. The circuit derivation is also applicable to the analysis of many photosensor arrays, with or without charge storage, as well as matrix display and memory arrays.