Voltage limiter
AssigneeNXP B.V.
InventorsThomas Pichler, Ivan Jesus Rebollo Pimentel
Life of this patent
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Abstract
A voltage limiter incorporated in a radio frequency identification (RFID) integrated circuit (IC) for a RFID tag is disclosed. The RFID IC includes a radio frequency (RF) rectifier and a clock generator. The RF rectifier is configured to convert an AC signal received from an antenna incorporated in the RFID tag to a DC signal. The voltage limiter includes a current sink device coupled between output of the RF rectifier and ground and a charge pump to control conduction of current through the current sink device to limit output voltage of the RF rectifier to a predefined voltage level.
Claims15
A voltage limiter incorporated in a radio frequency identification (RFID) integrated circuit (IC) for a RFID tag, the RFID IC including a radio frequency (RF) rectifier and a clock generator, the voltage limiter comprising:
- a current sink device coupled between output of the RF rectifier and ground;
- and
- a charge pump to control conduction of current through the current sink device to limit output voltage of the RF rectifier to a predefined voltage level,
- wherein the RF rectifier is configured to convert an AC signal received from an antenna incorporated in the RFID tag to a DC signal.
Dependencies are inferred from the claim text.