Patent ID: 7501881
Filing Date: 2009-03-10
Classification: G11C,H02M

Abstract:
1. A boosting voltage generating circuit, comprising: a boosting level detection unit configured to generate a target level detection signal and a margin level detection signal, the target level detection signal having a logic state according to a level of a boosting voltage compared with a target voltage level, and the margin level detection signal having a logic state according to a level of the boosting voltage compared with a margin voltage level, the margin voltage level being higher than the target voltage level; a first boosting pump configured to pump a supply voltage so as to increase the boosting voltage, the first boosting pump being controlled by the target level detection signal; and a second boosting pump configured to pump the supply voltage so as to increase the boosting voltage, the second boosting pump being controlled by the margin level detection signal, wherein the second boosting pump becomes enabled in response to an active command.