IC chip for identification, method for reading out data therefrom, and method for writing data thereinto
AssigneesFEC Co., Ltd., The Government of Malaysia
InventorsShiro Sugimura, Hideki Kobayashi, Shuhei Taniguchi
Life of this patent
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Abstract
In order to eliminate limitation upon the frequency of a carrier wave from externally, this IC chip for identification includes: a power supply section which receives this carrier wave from outside and creates an internal power supply; a clock signal generation section for read out which generates an internal clock signal for read out based upon a clock signal pulse which is superimposed upon an optical signal from externally; a memory section; and an output section which serially reads out data in the memory section according to the internal clock signal for read out, and load modulates the carrier wave from outside based thereupon.
Claims7
An IC chip for identification, comprising:
- an antenna which receives an external carrier wave;
- a power supply section which takes advantage of said external carrier wave to create an internal electrical current;
- a light reception element which receives an external optical signal upon which a clock signal pulse is superimposed;
- a clock signal generation section for read-out which generates an internal clock signal for read-out based upon said clock signal pulse;
- a memory section;
- and
- an output section which serially reads-out data in said memory section according to said internal clock signal for read-out, and load modulates said external carrier wave based thereupon.
A method for reading out data from an IC chip for identification, including:
- receiving an external carrier wave;
- creating an internal electrical current by taking advantage of said external carrier wave;
- receiving an external optical signal upon which a clock signal pulse is superimposed;
- generating an internal clock signal for read-out based upon said clock signal pulse;
- and
- serially reading out data which is stored in a memory section according to said internal clock signal for read-out, and load modulating said external carrier wave based thereupon.
A method for writing in data to an IC chip for identification, including:
- receiving an external carrier wave upon which a clock signal pulse is superimposed;
- creating an internal electrical current by taking advantage of said external carrier wave;
- generating an internal clock signal for writing-in based upon said clock signal pulse;
- receiving an external optical signal upon which data is superimposed;
- serially storing said data according to said internal clock signal for writing-in;
- and
- writing the data which has been stored into a memory section, and blocking said memory section so that any further writing-in into said memory section becomes impossible.
Dependencies are inferred from the claim text.