Abstract: A positioning input system with a wireless charging function, and a device thereof receive a frequency signal sent by a tablet and transmit an sensing signal to the tablet, wherein a rectifier circuit receives the frequency signal inducted by a sensing coil set, including a first sensing coil and a second sensing coil, to output electricity, the first sensing coil is non-connected, the second sensing coil is connected to the rectifier circuit, an oscillator circuit is connected to the rectifier circuit for receiving the electricity and outputting the sensing signal, and a third sensing coil transmits the sensing signal to the tablet. When the wireless positioning device is moved toward the tablet, a magnetic coupling occurs to the first sensing coil and the second sensing coil. The second sensing coil obtains an additional voltage used for supplying a stable operating voltage for the wireless positioning device.

Abstract: A peripheral apparatus, for connecting to a first or a second transmission port of an electronic device, includes a signal transmission interface, a triggering unit, an amplifying unit and an adjusting unit. The signal transmission interface, coupled to the first or the second transmission port, includes a first and a second group of pins. The triggering unit is coupled to the signal transmission interface. When the signal transmission interface is coupled to the first or the second transmission port, the triggering unit outputs a first or a second voltage level signal, respectively. The amplifying unit is coupled to the signal transmission interface and a functional unit. The adjusting unit, coupled to the signal transmission interface, the triggering unit, the amplifying unit and the functional unit, changes an output power transmitted from the amplifying unit to the functional unit according to the first or the second voltage level signal.