Patent ID: 7859328
Filing Date: 2010-12-28
Classification: H01L

Abstract:
1. A computer system, comprising: a substrate; a first current mirror having a first current, formed of at least two devices disposed on the substrate, wherein, when a stress is present, a behavior of at least one of the at least two devices forming the first current mirror is dependent on a direction in which the at least one of the at least two devices forming the first current mirror is disposed on the substrate; a second current mirror having a second current, formed of at least two devices disposed on the substrate, wherein, when the stress is present, a behavior of at least one of the at least two devices forming the second current mirror is dependent on a direction in which the at least one of the at least two devices forming the second current mirror is disposed on the substrate; and a calculating device for calculating a ratio of a difference between the first current and the second current to a sum of the first current and the second current, wherein the at least one of the at least two devices forming the first current mirror is disposed in a first orientation different than a second orientation of the at least one of the at least two devices forming the second current mirror, and wherein the magnitude of the stress present is calculated based on the first orientation, the second orientation, and the ratio.