Electronic device
AssigneeSTMicroelectronics International N.V.
InventorsAlbin Pevec, Nejc Suhadolnik, Damjan Bercan, Maksimiljan Stiglic
Life of this patent
Estimating the term…
Abstract
A device is configured to operate in a first mode of operation during which the device is configured to receive a first supply voltage in a contactless manner. The device includes a light emitting element and a first circuit. The first circuit is configured to receive a second supply voltage generated from the first supply voltage. A first current is generated from the first supply voltage, independent from the second voltage, and applied to the light emitting element which is selectively turned on.
Claims27
A device, comprising:
- a command circuit configured, in connection with device operation in a first mode of operation, to receive a first supply voltage in a contactless manner;
- a light emitting element;
- a first circuit configured to receive a second supply voltage that is generated from the first supply voltage;
- wherein the light emitting element is configured to receive a first current that is generated from the first supply voltage and independent from the second supply voltage and is selectively turned on;
- and
- a calibration circuit configured to implement a calibration operation before each selective turning on of the light emitting element.
A device, comprising:
- a command circuit configured, in connection with device operation in a first mode of operation, to receive a first supply voltage in a contactless manner;
- a light emitting element;
- and
- a first circuit configured to receive a second supply voltage that is generated from the first supply voltage;
- wherein the light emitting element is configured to receive a first current that is generated from the first supply voltage and independent from the second supply voltage and is selectively turned on;
- wherein the command circuit includes a second circuit implemented as an integrated circuit and configured to generate the second supply voltage on a first pin of the integrated circuit and a third circuit configured to generate the first current on a second pin of the integrated circuit;
- and
- wherein the third circuit comprises:
- a rectifier coupled between a first node of application of the first supply voltage and a second node;
- a first resistance;
- and a first transistor coupled in series between the second node and the second pin.
A device, comprising:
- a command circuit configured, in connection with device operation in a first mode of operation, to receive a first supply voltage in a contactless manner;
- a light emitting element;
- a first circuit configured to receive a second supply voltage that is generated from the first supply voltage;
- wherein the light emitting element is configured to receive a first current that is generated from the first supply voltage and independent from the second supply voltage and is selectively turned on;
- wherein the command circuit includes a second circuit implemented as an integrated circuit and configured to generate the second supply voltage on a first pin of the integrated circuit and a third circuit configured to generate the first current on a second pin of the integrated circuit;
- and
- a fourth circuit configured to generate a control voltage for the light emitting element, the light emitting element being coupled between an output of the fourth circuit and the second pin.
Dependencies are inferred from the claim text.