Patent ID: 7772718
Filing Date: 2010-08-10
Classification: H01R,H02J,Y02E

Abstract:
1. A master/slave outlet system, which comprises: an alternative current (AC) plug for receiving AC power; at least one master outlet, coupled to the AC plug; at least one salve outlet; a power switch, whose first end is coupled to the AC plug, and whose second end is coupled to the slave outlet; a current sensor, coupled to the master outlet, for receiving a feedback current from the master outlet and for outputting a sensing signal; an operational amplifier, coupled to the current sensor, in which the operational amplifier is used for amplifying and comparing the sensing signal with a first reference voltage to output a first control signal, and for amplifying and comparing the sensing signal with a second reference voltage to output a second control signal; a power supply, coupled to the AC plug, operational amplifier and power switch, which is controlled by the first control signal, so as to convert the AC power into a supply voltage to provide to the power switch; and a driver, coupled to the operational amplifier and power switch, which receives the second control signal and outputs a driving signal to the power switch, so as to control the power switch.