Patent ID: 8098043

Claim:
An induction type power supply device, comprising: a power supply base unit, said power supply base unit comprising a connection interface connectable to an electric outlet to obtain city power supply, an oscillator circuit adapted for producing an AC signal upon connection of said connection interface to an electric outlet, a driver circuit adapted for amplifying said AC signal, and a primary inductor adapted for obtaining a resonant frequency and releasing said AC signal; and an attached induction device, said attached induction device comprising a secondary inductor adapted for receiving said AC signal from said primary inductor by means of magnetic induction, a rectifier filter circuit adapted for converting said AC signal into a DC power supply, a power management circuit adapted for regulating said DC power supply subject to a predetermined voltage and current value, and a connection device for the connection of an external mobile electronic apparatus and for outputting the regulated DC power supply from said power management circuit to the connected external mobile electronic apparatus; wherein said primary inductor comprises a primary resonant circuit adapted to obtain resonance, and a primary coil adapted for receiving said AC signal from said primary resonant circuit and transmitting said AC signal to said secondary inductor of said attached induction device; and wherein said power supply base unit further comprises a feedback circuit and a primary control circuit, said feedback circuit feeding back said AC signal to said primary control circuit for analysis and comparison with a predetermined reference resonance, said primary control circuit outputting a control signal to said oscillator circuit to regulate the resonant frequency subject to the comparison result made.