Patent ID: 7304902
Filing Date: 2007-12-04
Classification: G11C

Abstract:
1. A pre-charge voltage supply circuit of a semiconductor device comprising: a first switch that supplies a pre-charge voltage in response to a first signal having a predetermined voltage level, and has a turn-on resistance of a predetermined level; and a second switch which is connected in parallel to the first switch, supplies the pre-charge voltage in response to a second signal, and has a turn-on resistance lower than the turn-on resistance of the first switch; a switching controller that receives a third signal enabled in response to an active command and disabled in response to a pre-charge command, and outputs the third signal, as the second signal, after delaying the third signal for the first predetermined period; and a third switch and a fourth switch, which are turned on in a pre-charge mode and a standby mode, to supply the pre-charge voltage to a bit line and a complementary bit line, wherein the third switch and the fourth switch operate in response to a fourth signal disabled during an active mode, to isolate the bit line and the complementary bit line from each other during the active mode.