Telecommunications – Receiver or analog modulated signal frequency converter – With particular receiver circuit
Reexamination Certificate
2011-02-01
2011-02-01
Dao, Minh D (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
With particular receiver circuit
C455S127100, C455S572000, C455S571000, C340S572800, C235S380000
Reexamination Certificate
active
07881693
ABSTRACT:
In an RF tag, a mask ROM or a flash memory is used for storing data such as an ID number. Although the mask ROM can be realized at a low price, rewriting is not possible. In addition, in the flash memory, although electric rewriting is possible, production cost increases. Accordingly, it is difficult to provide an RF tag by which data rewriting is possible at a low price. An RF tag is provided with a power supply circuit having a function to generate a power supply voltage from a weak radio signal and a memory which can hold data stored in a data holding portion by the power supply voltage. With the above structure, a high-performance RF tag capable of rewriting data such as an ID number after production can be provided at a low price.
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Search Report, European Application No. 07019954.2; dated Nov. 17, 2010, 6 pages.
Dao Minh D
Fish & Richardson P.C.
Semiconductor Energy Laboratory Co,. Ltd.
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