发明授权
- 专利标题: Logic circuit and semiconductor integrated circuit device capable of operating by different power supplies
- 专利标题(中): 逻辑电路和半导体集成电路器件能够由不同的电源操作
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申请号: US149187申请日: 1988-01-27
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公开(公告)号: US4853560A公开(公告)日: 1989-08-01
- 发明人: Masahiro Iwamura , Hideo Maejima , Ikuro Masuda
- 申请人: Masahiro Iwamura , Hideo Maejima , Ikuro Masuda
- 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: JPX62-24565 19870206
- 主分类号: H03K19/0175
- IPC分类号: H03K19/0175 ; H03K19/0185 ; H03K19/08 ; H03K19/0944
摘要:
When a counter-part power supply designator of a first LSI designates that the counter-part power supply voltage of another LSI is a first power supply difference which is the same as the power supply difference of its own, an output circuit control controls an output circuit and the output circuit produces an output signal having a level adaptive to the counter-part LSI operating at the first power supply voltage. When the counter-part power supply voltage designator designates that the counter-part power supply voltage difference, lower than the first power supply voltage difference, the output circuit control controls the output circuit and the output circuit produces an output signal having a level adaptive to the counter-part LSI operating at the second power supply voltage difference. Thus, a plurality of LSIs can be operated at mutually different power supply voltages.
公开/授权文献
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