| 发明名称 | Integrated circuit with power state determination circuit | ||
| 摘要 | An integrated circuit in which a power terminal, a ground terminal, an input terminal and an internal circuit are formed, has a unidirectional circuit of a direction from the input terminal to the power terminal, the unidirectional circuit being provided between the input terminal and the power terminal; and a power state determination circuit which detects whether the power terminal is connected to an external power source or not to output a power open detection signal. And the unidirectional circuit includes a first transistor in which a voltage of the power terminal is applied to a gate, and a second transistor connected to the first transistor in series, and a voltage of the external power source is input to the input terminal. | ||
| 申请公布号 | US8754632(B2) | 申请公布日期 | 2014.06.17 |
| 申请号 | US201113159543 | 申请日期 | 2011.06.14 |
| 申请人 | Fujitsu Semiconductor Limited | 发明人 | Sugiyama Hidetoshi;Nagasawa Takayuki;Suzuki Hideaki |
| 分类号 | G01R19/00 | 主分类号 | G01R19/00 |
| 代理机构 | Fujitsu Patent Center | 代理人 | Fujitsu Patent Center |
| 主权项 | 1. An integrated circuit in which a power terminal, a ground terminal, an input terminal and an internal circuit are formed, comprising: a unidirectional circuit of a direction from the input terminal to the power terminal, the unidirectional circuit being provided between the input terminal and the power terminal, the unidirectional circuit including a first transistor and a second transistor, a voltage of the power terminal being applied to a gate of the first transistor, the first transistor and the second transistor being connected in series between the input terminal and the power terminal; and a power state determination circuit which detects whether the power terminal is connected to an external power source or not to output a power open detection signal, wherein a voltage of the external power source is input to the input terminal. | ||
| 地址 | Yokohama JP | ||