Patent ID: 7088015
Filing Date: 2006-08-08
Classification: H02J,H02M

Abstract:
1. A circuit arrangement for controllably interfacing an electrically powered utility device with power derived from a first voltage supplied by a main power source, for an active mode of operation of said utility device and irrespective of a second voltage supplied by an auxiliary power source, and, for a quiescent mode of operation of said utility device and irrespective of said first voltage supplied by said main power source, for interfacing said electrically powered utility device with power derived from said second voltage supplied by said auxiliary power source, said circuit arrangement comprising: a controlled circuit path having a first input port coupled to receive said first voltage from said main power source, a second input port coupled to receive said second voltage from said auxiliary power source, an output port to which said utility device is coupled, and a control port; an operational amplifier having an input, and an output coupled to said control port of said controlled circuit paths; and a circuit path controller, coupled to said input of said operational amplifier, and being operative,