Patent ID: 8392132
Filing Date: 2013-03-05
Classification: G01R,G11C,H01L

Abstract:
1. A process variation detection apparatus applicable to a non-volatile memory, comprising: a process variation detector, comprising: a first process variation detection component, having a channel of a first conductive type; a second process variation detection component, having a channel of a second conductive type, wherein the above-mentioned first conductive type is different from the second conductive type; and a current comparator, connected to the first process variation detection component and the second process variation detection component for comparing the current difference between the two components and outputting a current comparison result; and a compensation signal generator, connected to the process variation detector and producing a corresponding compensation signal according to the current comparison result; wherein the first process variation detection component comprises a P-channel metal oxide semiconductor (PMOS) transistor and the second process variation detection component comprises an N-channel metal oxide semiconductor (NMOS) transistor.