Patent ID: 6791897
Filing Date: 2004-09-14
Classification: G11C

Abstract:
A word line driving circuit comprising:a main word line driving circuit configured to output a word line driving signal into an output node; and a control circuit configured to generate control signals to control the main word line driving circuit, the main word line driving circuit comprising: a PMOS transistor connected between the power supply and a node, wherein the PMOS transistor is responsive to an output control signal of the control circuit, a plurality of NMOS transistors serially connected to each other between the node and the ground, wherein the NMOS transistors are responsive to output control signals of the control circuit, respectively, a pull-up transistor connected between the power supply and the output node, a pull-down transistor connected between the output node and the around, an inverter connected between a gate terminal of the pull-down transistor and the node, and a logically combined means configured to logically combine an output control signal of the control circuit and the potential of the node to supply the logically combined signal to a gate terminal of the pull-up transistor, wherein the main word line driving circuit configured to control the word line driving signal, to turn off the pull-up transistor and to turn on the pull-down transistor in response to an active command, to enable the word line driving signal to a LOW state, to turn on the pull-up transistor and to turn off the pull-down transistor for a given period of time in response to a precharge command, to precharge the word line driving signal to a HIGH state, and to turn off the pull-up transistor and the pull-down transistor to float the output node after the precharge command.