Patent ID: 9287932
Filing Date: 2016-03-15
CPC Classification: H04B

Claim Text:
1. A power supply for powering an appliance, the power supply comprising: a modem comprising a digital section for digital modulation and demodulation of data and an interface for providing at least one of data transmission and data reception between the modem and the appliance; a power source for providing a DC supply voltage for the appliance at a DC power plug that is separate from the interface, and for providing an operating voltage for the modem including the interface; and a power controller including a current sense element for sensing a supply current of the DC supply voltage for the appliance, and a threshold circuit coupled to the current sense element; wherein the threshold circuit is adapted to: sense the supply current of the DC supply voltage; enable the operating voltage for the modem including the interface to be switched off when the supply current for the appliance is below a first threshold value; and enable the operating voltage for the modem including the interface to be switched on when the appliance is switched on and the supply current is above a second threshold value; and wherein the modem switches to a low power standby mode when no data transmission is requested by the appliance and no data is received by the modem from a power line.