RFID transponder and RFID transponder chip
First Claim
1. An RFID transponder comprising:
- an antenna;
a data control circuit that demodulates reception data received by said antenna and modulates transmission data in order to output the transmission data from said antenna;
a temperature sensor;
a nonvolatile memory that stores temperature information indicating a temperature measured by said temperature sensor;
a memory control circuit that accesses said nonvolatile memory; and
a power supply control circuit that supplies a first power supply voltage to said temperature sensor in response to a request for temperature measurement received via said antenna, and supplies a second power supply voltage to said nonvolatile memory and said memory control circuit after said temperature sensor measures the temperature.
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0 Petitions
Accused Products
Abstract
A nonvolatile memory is accessed by a memory control circuit and stores temperature information indicating a temperature measured by a temperature sensor. A power supply control circuit supplies a first power supply voltage to the temperature sensor in response to a request for temperature measurement received via an antenna, and supplies a second power supply voltage to the nonvolatile memory and the memory control circuit after the temperature sensor measures the temperature. While the temperature sensor is measuring the temperature, the nonvolatile memory and the memory control circuit do not operate and thus do not generate heat. Therefore, the temperature sensor can accurately measure the temperature without being influenced from the heat generation caused by the operation of circuits in an RFID transponder.
39 Citations
20 Claims
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1. An RFID transponder comprising:
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an antenna;
a data control circuit that demodulates reception data received by said antenna and modulates transmission data in order to output the transmission data from said antenna;
a temperature sensor;
a nonvolatile memory that stores temperature information indicating a temperature measured by said temperature sensor;
a memory control circuit that accesses said nonvolatile memory; and
a power supply control circuit that supplies a first power supply voltage to said temperature sensor in response to a request for temperature measurement received via said antenna, and supplies a second power supply voltage to said nonvolatile memory and said memory control circuit after said temperature sensor measures the temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. An RFID transponder chip comprising:
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a data control circuit that demodulates reception data received by an external antenna and modulates transmission data in order to output the transmission data from said antenna;
a temperature sensor;
a nonvolatile memory that stores temperature information indicating a temperature measured by said temperature sensor;
a memory control circuit that accesses said nonvolatile memory; and
a power supply control circuit that supplies a first power supply voltage to said temperature sensor in response to a request for temperature measurement received via said antenna, and supplies a second power supply voltage to said nonvolatile memory and said memory control circuit after said temperature sensor measures the temperature. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification