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公开(公告)号:US5278458A
公开(公告)日:1994-01-11
申请号:US807545
申请日:1991-12-13
IPC分类号: H03K3/3565 , H03K17/30 , H05K3/01 , H05K5/153
CPC分类号: H03K17/302 , H03K3/3565
摘要: One aspect of the present invention includes a circuit for detecting when an input voltage exceeds a predetermined threshold. The circuit for detecting includes an input for receiving the input voltage. Further, the circuit includes a plurality of switching devices, wherein each of the switching devices comprises a first and second terminal for defining a variable conductive path, and a third terminal for receiving a signal to control said variable conductive path. The plurality of switching devices includes three switching devices. The first switching device has a first terminal coupled to the input and a second terminal coupled to a first node. The second switching device has a first terminal coupled to the first node and a second terminal coupled to a second node. Finally, the third switching device has a first terminal coupled to the second node. Each of the first, second and third switching devices are of like conductivity type, and the second node provides a first voltage if the input voltage is below the predetermined threshold and provides a second voltage if the input voltage is above the predetermined threshold.
摘要翻译: 本发明的一个方面包括用于检测输入电压何时超过预定阈值的电路。 用于检测的电路包括用于接收输入电压的输入端。 此外,电路包括多个开关装置,其中每个开关装置包括用于限定可变导电路径的第一和第二端子,以及用于接收控制所述可变导电路径的信号的第三端子。 多个开关装置包括三个开关装置。 第一开关装置具有耦合到输入的第一端子和耦合到第一节点的第二端子。 第二交换设备具有耦合到第一节点的第一终端和耦合到第二节点的第二终端。 最后,第三交换设备具有耦合到第二节点的第一终端。 第一,第二和第三开关装置中的每一个具有类似导电类型,如果输入电压低于预定阈值,则第二节点提供第一电压,并且如果输入电压高于预定阈值则提供第二电压。