发明授权
- 专利标题: Semiconductor device having D/A conversion portion
- 专利标题(中): 具有D / A转换部分的半导体器件
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申请号: US11877561申请日: 2007-10-23
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公开(公告)号: US07522083B2公开(公告)日: 2009-04-21
- 发明人: Ryusuke Sahara , Mitsugu Kusunoki , Kazutaka Mori , Hiroshige Kogayu
- 申请人: Ryusuke Sahara , Mitsugu Kusunoki , Kazutaka Mori , Hiroshige Kogayu
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Miles & Stockbridge P.C.
- 优先权: JP2005-128857 20050427
- 主分类号: H03M1/78
- IPC分类号: H03M1/78
摘要:
A DAC having a memory mat including a plurality of first memory cells, and a plurality of output lines connected to the plurality of first memory cells. Each of the plurality of memory cells has a first memory portion including bipolar transistors and storing information in non-volatility based on whether a junction of the bipolar transistors is destroyed or not, and a second memory portion connected to the first memory portion and for outputting information to corresponding one of the plurality of output lines. The DAC has a first mode in which information is transferred from the first memory portions to the second memory portions when the information is written into the second memory portions, and a second mode in which the second memory portions are specified externally and information is written into the second memory portions. Thus, the performance of a D/A converter can be improved.
公开/授权文献
- US20080055140A1 SEMICONDUCTOR DEVICE 公开/授权日:2008-03-06