Voltage supply device and method for operating such a voltage supply device
AssigneeInfineon Technologies AG
InventorDietmar Scheiblhofer
Life of this patent
Estimating the term…
Abstract
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.
Claims19
A voltage supply device for use in portable devices, comprising:
- a connection which is designed to connect an energy storage device;
- 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;
- and
- a second means which is designed to provide a second supply voltage for operating a contactless interface irrespective of the threshold value.
A method for operating a voltage supply device, comprising the steps of:
- providing an energy storage device;
- providing a contactless interface;
- determining a charge state of the energy storage device and comparing the charge state with a predetermined threshold value;
- providing a first supply voltage and providing a second supply voltage which is provided for operating the contactless interface when the charge state in the energy storage device is above a threshold value;
- and
- providing only the second supply voltage when the charge state is below the threshold value.
A voltage supply device for use in portable devices, comprising:
- a connection which is designed to connect an energy storage device;
- a first means for providing a first supply voltage when the energy stored in the energy storage device is above a threshold value and for not providing a supply voltage when the stored energy is below the threshold value;
- and
- a second means for providing a second supply voltage for operating a contactless interface irrespective of the threshold value.
Dependencies are inferred from the claim text.