Power supply circuit in ic chip for non-contact ic card

Details Power supply circuit in ic chip for non-contact ic card Power supply circuit in ic chip for non-contact ic card

G - Physics

06

K

G06K 19/07 (2006.01) H02J 17/00 (2006.01)

Patent

CA 2507719

The capacitance of a smoothing capacitor is reduced, and the size of an IC chip is minimized. A series transistor is provided on the output side of a diode which rectifies the output voltage of an antenna, and the smoothing capacitor is connected to the base of the series transistor. If the current gain of the series transistor T is .beta. then the apparent capacitance of the smoothing capacitor C2 is multiplied by .beta..

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