Apparatus for sensing data in data bus lines

DETAILED DESCRIPTION It is an object to provide a data sense circuit which prevents the charge share caused by direct connection between the bit lines and the data bus lines, reduces power consumption caused by charge and discharge of the data bus lines by operating the data bus sense amplifier according to current difference, and holds the same voltage level in the data bus lines.
To achieve said object, this invention comprises a pair of bit lines; a word line; a pair of data bus lines; bit line sense amplifying means connected to said pair of bit lines and said wold line; a voltage difference to current difference converter connected to said bit line sense amplifying means through said pair of bit lines, for converting the voltage difference between said pair of bit lines to the current difference; current sensing means connected to said pair of data bus lines and a power source, for sensing a current flowing through said pair of data bus lines and holding the same voltage level in said pair of data bus lines; and current difference to voltage difference converting and amplifying means connected to said current sensing means, for converting the current difference occupied in said current sensing means to the voltage difference and amplifying the voltage difference.