发明授权
US5285414A Semiconductor memory having transistors which drive data lines in
accordance with values of write data and column select signal
失效
具有根据写数据和列选择信号的值驱动数据线的晶体管的半导体存储器
- 专利标题： Semiconductor memory having transistors which drive data lines in accordance with values of write data and column select signal
- 专利标题（中）： 具有根据写数据和列选择信号的值驱动数据线的晶体管的半导体存储器
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申请号： US765838申请日： 1991-09-26
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公开(公告)号： US5285414A公开(公告)日： 1994-02-08
- 发明人: Tatsumi Yamauchi , Masahiro Iwamura , Kazutaka Mori
- 申请人： Tatsumi Yamauchi , Masahiro Iwamura , Kazutaka Mori
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-256401 19900926; JPX3-018592 19910212
- 主分类号： G11C7/12
- IPC分类号： G11C7/12 ; G11C11/419 ; G11C11/40
摘要：
A semiconductor memory comprises a write driver which is provided to correspond to respective data line and by which data lines connected with a memory cell through the control of a word line are driven in a write operation. The write driver includes MOSFETs of first group and MOSFETs of second group. In a case where a write enable signal does not designate the write operation, the MOSFETs of the first group are normally in ON states to pull up the data lines. Besides, in a case where the write enable signal designates the write operation, each of them operates in accordance with the value of input data, to maintain the ON states and pull up the corresponding data line in case of driving the data line to a "high" level and to fall into OFF states in case of driving the data line to a "low" level. On the other hand, the MOSFETs of the second group are normally in OFF states. Besides, in the case where the write enable signal designates the write operation, each of them operates in accordance with the value of the input data, to fall into ON state and draw the corresponding data line to the low level in the case of driving the data lines to the low level.
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