RFID system including a memory for correcting a fail cell and method for correcting a fail cell using the same
First Claim
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1. A radio frequency identification (RFID) system, comprising:
- an analog block configured to transmit data to an external communication apparatus and receive data from said external communication apparatus;
a digital block configured to receive a power voltage and a signal for data transmission from the analog block, and to transmit a response signal to the analog block;
a memory configured to store a first data in a memory group consisting of a predetermined number of unit cells having the same address at a write mode, and to correct cell data of said memory group selected at a read mode to output the corrected cell data as effective data, wherein the first data is stored in each unit cell; and
a correction unit configured to compare cell data in said each memory group and to output the corrected cell data as effective data, wherein the correction unit compares the first data stored in the predetermined number of unit cells, and transmits the compared first data out when the compared first data are the same, and does not transmits the compared first data out when the compared first data are different.
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Abstract
A radio frequency identification (RFID) system and a method for correcting a failed cell using the same are provided. The RFID system effectively corrects randomly distributed cell data by using a failed cell correcting circuit in a memory. In the RFID system, a predetermined number of unit cells are separated into one memory group, and the same data are stored in each memory group at a write mode. At a read mode, the cell data of the selected memory group are compared, and the same data are identified as effective data to improve yield of the RFID system.
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Citations
20 Claims
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1. A radio frequency identification (RFID) system, comprising:
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an analog block configured to transmit data to an external communication apparatus and receive data from said external communication apparatus; a digital block configured to receive a power voltage and a signal for data transmission from the analog block, and to transmit a response signal to the analog block; a memory configured to store a first data in a memory group consisting of a predetermined number of unit cells having the same address at a write mode, and to correct cell data of said memory group selected at a read mode to output the corrected cell data as effective data, wherein the first data is stored in each unit cell; and
a correction unit configured to compare cell data in said each memory group and to output the corrected cell data as effective data, wherein the correction unit compares the first data stored in the predetermined number of unit cells, and transmits the compared first data out when the compared first data are the same, and does not transmits the compared first data out when the compared first data are different. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for correcting a failed cell of a RFID system, the RFID system comprising an analog block configured to transmit data to an external communication apparatus and receive data from said external communication apparatus;
- a digital block configured to receive a power voltage and a signal for data transmission from the analog block, and to transmit a response signal to the analog block; and
a memory configured to receive the memory control signals and to correct the failed cell, the method comprising;a writing step of writing a first data in a memory group including a predetermined number of unit cells having the same address, wherein the first data is written to each unit cell; and a correcting step of correcting data stored in the memory group to output the corrected data as effective data, wherein the first data stored in the predetermined number of unit cells are compared with other, when the compared first data are the same then outputs the compared first data as effective data, and does not output the compared first data when the compared first data are different. - View Dependent Claims (19, 20)
- a digital block configured to receive a power voltage and a signal for data transmission from the analog block, and to transmit a response signal to the analog block; and
Specification