Patent ID: 9698786
Date: 2017-07-04
CPC Classifications: G06F,H03K

Claim:
1. An apparatus comprising: an interface port configured and arranged for communicating power and data with external circuits connected to the interface port; a first circuit configured and arranged to detect and identify a type of external circuit connected to the interface port, based on electrical characteristics presented at the interface port via the external circuit; a first circuit path including first and second transistors that are configured and arranged to couple power between the interface port and an internal circuit, the first transistor having source/drain terminals respectively connected to the interface port and to the second transistor, the second transistor having source/drain terminals respectively connected to the first transistor and the internal circuit; and a second circuit configured and arranged with the first circuit and the first transistor to mitigate current leakage by setting a voltage across the source/drain terminals of the first transistor based on a voltage level provided on the interface port.