Patent ID: 9083536
Filing Date: 2015-07-14
Classification: G06F,H04L

Abstract:
1. A method of monitoring powering of a device through a local area network (LAN) connection comprising: applying a time-varying voltage to a second terminal of the LAN connection through a de-coupling capacitor while powering the device by applying a DC voltage to a first terminal of the device, with the time-varying voltage and the de-coupling capacitor being connected in series, with a diode having an anode terminal coupled between the de-coupling capacitor and the second terminal, and having a cathode terminal; sensing a time-varying voltage on the second terminal caused by the applied time-varying voltage; and continuing powering of the device with the DC voltage based upon at least one electric parameter of the sensed time-varying voltage via a switch coupled in parallel to the de-coupling capacitor and the time-varying voltage generator when the switch is in a closed position, with the switch being operated based on a below ground voltage being detected at the anode terminal of the diode.