RFID tags circuits and methods for sensing own power to predetermine feasibility of requested action
AssigneeImpinj, Inc.
InventorsAlberto Pesavento, Vadim Gutnik, John D. Hyde
Life of this patent
Estimating the term…
Abstract
Feasibility of a requested action by a reader is predetermined in an RFID tag based on an available tag power level. A pretest that is designed to consume artificially high levels of power is performed and the power level monitored to determine if a preset condition is met. The pretest may include activation of selected components such as a memory and associated support circuitry. If the preset condition is not met, the requested action is aborted and an error message transmitted to the reader.
Claims76
A method for an RFID tag, comprising:
- receiving a command associated with a tag operation at a first circuit of the RFID tag from an RFID reader;
- determining at a second circuit of the RFID tag, responsive to the received command, whether a power adequacy condition is met for performing the tag operation;
- and
- if so, performing the tag operation in response to the received command, else not performing the tag operation.
A method for an RFID tag, comprising:
- determining at a first circuit of the RFID tag whether a power adequacy condition is met for performing a tag operation associated with a reader command;
- receiving a command associated with the tag operation at a second circuit of the RFID tag from an RFID reader;
- if the power adequacy condition is not met, transmitting a non-compliance response to the reader, else performing the tag operation in response to the received command.
A Radio Frequency Identification (RFID) circuit for use in an RFID tag, comprising:
- a first circuit arranged to receive a command associated with a tag operation from an RFID reader;
- and
- a second circuit arranged to determine, responsive to the received command, whether a power adequacy condition is met for performing the tag operation, and if so to perform the tag operation in response to the received command, else not to perform the tag operation.
A Radio Frequency Identification (RFID) circuit for use in an RFID tag, comprising:
- a first circuit arranged to determine whether a power adequacy condition is met for performing a tag operation;
- a second circuit arranged to receive a command associated with the tag operation from an RFID reader;
- and
- a third circuit arranged to transmit a non-compliance response to the reader if the power adequacy condition is not met, else to perform the tag operation in response to the received command.
A Radio Frequency Identification (RFID) tag, comprising:
- at least one antenna;
- a rectifier circuit, coupled to the at least one antenna, wherein the rectifier circuit is configured to receive a carrier wave and provide a supply voltage to tag circuits derived from the carrier wave;
- a tag processor arranged to receive a command associated with a tag operation from an RFID reader;
- and
- a Power Management Unit (PMU) arranged to determine, responsive to the received command, whether a power adequacy condition is met for performing the tag operation, and if so to perform the tag operation in response to the received command, else not to perform the tag operation.
Dependencies are inferred from the claim text.