Method for Detecting Intermittent Opens and Shorts in a Commonly Connected Resistive Network
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-27
Differential networks used for thin film magneto-resistive or inductive read heads, including the associated cables and connectors, can be simply viewed as a resistive network with closely matched elements tied to a common ground. This matched element network is commonly encountered due to the desirability of obtaining very high common mode noise rejection. Although solid shorts and opens are easily detected with typical measurement methods, intermittent shorts or opens cannot be effectively detected due to the common ground bus connecting the resistive elements and the limited observation time of these methods.