IC chip for identification, method for reading out data therefrom, and method for writing data thereinto
First Claim
1. An IC chip for identification, comprising:
- a power supply section which takes advantage of a carrier wave from outside to create an internal electrical current;
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 outside;
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 carrier wave from outside based thereupon.
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Accused Products
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.
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Citations
7 Claims
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1. An IC chip for identification, comprising:
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a power supply section which takes advantage of a carrier wave from outside to create an internal electrical current;
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 outside;
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 carrier wave from outside based thereupon. - View Dependent Claims (2, 3, 4, 5)
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6. A method for reading out data from an IC chip for identification, wherein:
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an internal clock signal for read out is generated based upon a clock signal pulse which is superimposed upon an optical signal from outside; and
data which is stored in a memory section is serially read out according to said internal clock signal for read out, and said carrier wave from outside is load modulated based thereupon.
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7. A method for writing in data to an IC chip for identification, wherein:
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an internal clock signal for writing in is generated based upon a clock signal pulse which is superimposed upon a carrier wave from outside;
data which is superimposed upon an optical signal from outside is serially stored according to said internal clock signal for writing in; and
the data which has been stored is written into a memory section, and said memory section is blocked so that writing in to it becomes impossible.
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Specification