A sense amplifier overdriving circuit includes a first voltage driver
which supplies an internal voltage from an internal voltage terminal to a
sense amplifier in response to a first enabling signal, a logic unit
which logically operates a block select signal for selection of a cell
block and a second enabling signal enabled for a predetermined time after
enabling of the first enabling signal, and outputs the resultant signal,
and a second voltage driver which supplies an external voltage to the
internal voltage terminal in response to the signal output from the logic
unit. The sensing amplifier overdriving circuit may be used in a
semiconductor device.