Patent ID: 7450439
Filing Date: 2008-11-11
Classification: G05F,G11C

Abstract:
1. An internal power supplying device, comprising: a dead zone controller to generate a reference voltage, a high reference voltage and a low reference voltage by dividing an input power voltage; and an internal power generator to generate an internal power based on the reference voltage by comparing the internal power with the high reference voltage and the low reference voltage, wherein the high reference voltage that is higher than the reference voltage is used to decide whether or not a level of the internal power is increased and the low reference voltage that is lower than the reference voltage is used to decide whether or not a level of the internet power is decreased, wherein the dead zone controller includes first to fourth resistors coupled in series between the power voltage and a power ground to generate the reference voltage, the high reference voltage and the low reference voltage, the high reference voltage output between the first and the second resistors, the reference voltage output between the second and third resistors and the low reference voltage output between the third and the fourth resistors, and wherein the first and fourth resistors have larger resistance than the second and third resistors.