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Abstract

A reference voltage generating circuit of a sense amplifier using a residual data line which has the effect of reducing a layout and setting an accurate reference voltage by using a residual data line as a reference voltage, includes N memory cell arrays comprising cell blocks for storing data, N+1 sense amplifiers located over and below the memory cell arrays for reading out data from the selected cell block in the memory cell array to amplify to a predetermined level and output, a multiplexor for selectively outputting data outputted from the N+1 sense amplifiers in accordance with externally inputted data line select signal, a reference voltage generator for setting as a reference voltage a signal value of a non-adopted line of the sense amplifier according to the sense amplifier located at both ends of the memory cell array, and N data bus sense amplifiers for comparing data transmitted from the multiplexor with the reference voltage transmitted from the reference voltage generator.

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First Claim