发明申请
US20110193590A1 SEMICONDUCTOR DEVICE AND CIRCUIT BOARD HAVING THE SEMICONDUCTOR DEVICE MOUNTED THEREON
审中-公开
具有安装在其上的半导体器件的半导体器件和电路板
- 专利标题： SEMICONDUCTOR DEVICE AND CIRCUIT BOARD HAVING THE SEMICONDUCTOR DEVICE MOUNTED THEREON
- 专利标题（中）： 具有安装在其上的半导体器件的半导体器件和电路板
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申请号： US13019648申请日： 2011-02-02
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公开(公告)号： US20110193590A1公开(公告)日： 2011-08-11
- 发明人: Hiroshi Nakagawa , Satoru Nishimura
- 申请人： Hiroshi Nakagawa , Satoru Nishimura
- 申请人地址： JP Tokyo
- 专利权人： Elpida Memory, Inc.
- 当前专利权人： Elpida Memory, Inc.
- 当前专利权人地址： JP Tokyo
- 优先权： JP2010-024783 20100205; JP2010-145948 20100628
- 主分类号： H03K17/16
- IPC分类号： H03K17/16
摘要：
To provide a semiconductor device including a first replica buffer connected to a calibration terminal, an impedance adjusting circuit that changes an impedance of the first replica buffer according to a comparison result between a potential of the terminal and a reference potential, and an impedance adjusting circuit that changes an impedance of a third replica buffer according to a comparison result between a potential of a connection node of a second replica buffer and the third replica buffer and a potential of the terminal. According to the present invention, both impedances of the first and third replica buffers are adjusted based on the potential of the terminal, and therefore an adjustment error of one of the replica buffers is not superimposed with an adjustment error of the other replica buffer.
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