| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system and a method for switching to a back-up power source. <P>SOLUTION: One such system includes a threshold detector circuit (102), a first switching circuit (108-2) for enabling access to a first power source , the first switching circuit comprising at least a first transistor, and a second switching circuit (108-1) for enabling access to a second power source, the second switching circuit comprising at least a second transistor, wherein a threshold detector is configured to enable the second switching circuit to access the second power source responsive to a voltage provided by the first power source dropping below a predetermined threshold. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
