Patent ID: 6502145
Filing Date: 2002-12-31
Classification: G11C

Abstract:
A semiconductor integrated circuit comprising:a first word line; first and second bit lines which are paired with each other, at least one of which is selectively connected to a memory cell by said first word line; third and fourth bit lines provided corresponding to said first and second bit lines respectively and paired with each other; a first transistor connected between said first and third bit lines in series and on-off controlled in response to a first signal sent to a control electrode; a second transistor connected between said second and fourth bit lines in series and on-off controlled in response to said first signal sent to a control electrode; first and second power lines capable of supplying a first voltage and a second voltage different from said first voltage, and of being cut off from a power supply to be brought into a floating state; a third power line for supplying a third voltage between said first and second voltages; switching means for connecting said third power line to said third and fourth bit lines in response to an equalize signal; a third transistor having a first current electrode connected to said first power line, a second current electrode connected to said third bit line, and a control electrode connected to said fourth bit line; a fourth transistor having a first current electrode connected to said first power line, a second current electrode connected to said fourth bit line, and a control electrode connected to said third bit line; a fifth transistor having a first current electrode connected to said second power line, a second current electrode connected to said second current electrode of said third transistor, and a control electrode connected to said second bit line; and a sixth transistor having a first current electrode connected to said second power line, a second current electrode connected to said second current electrode of said fourth transistor, and a control electrode connected to said first bit line.