| 摘要 |
A multiport memory device according to this invention comprises a power source, a memory cell for storing data, a first bit line, a first word line, a first switch which has an input section connected to the first word line and a current path whose one end is connected to the first bit line, and which provides on/off control according to the potential of the first word line, a second bit line, a second word line, a second switch which has an input section connected to the second word line and a current path whose one end is connected to the second bit line, and which provides on/off control according to the potential of the second word line. It further comprises a third switch which has an input section connected to the memory cell and a current path whose one end is connected to both the other end of the current path of the first switch and the other end of the current path of the second switch and whose other end is connected to the power source, and which provides on/off control according to the presence/absence of data in the memory cell.
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