Patent ID: 6769070
Filing Date: 2004-07-27
Classification: G06F,Y02D

Abstract:
A circuit for switching a device between a main power mode and a standby power mode, said circuit comprising:an opto-coupler coupled to a secondary power source, wherein said opto-coupler is operable to detect a voltage from said secondary power source; and an integrated circuit coupled to said opto-coupler, wherein said integrated circuit is powered on in response to said opto-coupler detecting said voltage from said secondary power source, and wherein said integrated circuit is powered off in response to said opto-coupler not detecting said voltage; wherein detecting said voltage by said opto-coupler causes said device to be placed in said main power mode, and wherein not detecting said voltage by said opto-coupler causes said device to be placed in said standby power mode, wherein said device is coupled to a primary power source, wherein said primary power source supplies an alternating current substantially equivalent to 230 volts and wherein said circuit consumes power at a rate of less than one watt while said device is in said standby power mode.