Patent ID: 7536568

Claim:
An apparatus for selectively enabling power comprising: a power supply; a device having a controller and an input activated by a user, said controller selectively powered by the power supply; a sensing circuit for sensing activation of the input by the user and for enabling the power supply to provide power to the controller in response to the sensed activation of the input by the user; a latch circuit for causing the power supply to continue to provide power to the controller; a load switch responsive to a power supply enable signal for supplying power to the controller; wherein the sensing circuit initially provides the power supply enable signal to the load switch in response to the sensed activation of the input by the user; wherein the latch circuit provides the power supply enable signal to the load switch while the latch circuit is enabled by the controller and discontinues providing the power supply enable signal when disabled by the controller; and said controller responsive to the sensed activation of the input by the user for enabling the latch circuit and for disabling the latch circuit.