| 摘要 |
<p>Methods, devices and circuits are provided for protection from backdrive current. One such device is subject to back voltage from an output node (output) of the device and includes circuitry (104,106) that is configured to compare the supply voltage node (VDD_IN) and the output node (output). In response to the comparison, the circuitry generates an output signal. Level shifted versions of the output signal are used to provide an output voltage corresponding to the higher of a supply voltage node and an output node. Switches (108,110) are used to place the device (112) in different modes in response to the output signal.
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