| 摘要 |
A voltage supply device for use in portable devices comprises a connection which is designed to connect an energy storage device, and a first means which is designed to provide a first supply voltage when the energy stored in the energy storage device is above a threshold value and not to provide a supply voltage when the stored energy is below the threshold value. The voltage supply device has a second means which is designed to provide a second supply voltage for operating a contactless interface irrespective of the threshold value.
|
