| 摘要 |
a first input line for inputting true data; a second input line for inputting complement data; a pull-up transistor connected among a first power supply source, an output line and the first input line; a pull-down transistor connected among a second power supply source, the output line and the second input line; a variable resistor device controlling an amount of current being supplied from the second input line to the pull-down transistor, and removing a noise signal to be included in output data of low logic on the output line; and a switch device selectively connecting the variable resistor device to the second input line only when the complement data is applied to the second input line. The buffer is useful for externally transmitting data read in memory cells of semiconductor memory device via output lines, and can minimize generation of ground noise in data being transmitted to external circuit device via output line.
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