METHOD AND APPARATUS FOR STOPPING POWER SUPPLY IN RFID SYSTEM

• US 20080136594A1
• Filed: 10/24/2007
• Published: 06/12/2008
• Est. Priority Date: 12/08/2006
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: CHOI, Su Na, YEO, Jun Ho, PYO, Cheol Sig, CHOI, Gil Young, SON, Hae Won, JUNG, Jae-Young, SEO, Jong Hyun
• Granted Patent: US 8,416,063 B2
• Time in Patent Office: Days
• US Class Current: 340/10.1
• CPC Class Codes: G06K 19/0701 at least one of the integrated circuit chips comprising an arrangement for power management
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Provided are a method and apparatus for stopping power supply to a radio frequency identification (RFID) system. The apparatus includes: a power supplier supplying power to a high RFID tag; an input unit rectifying and boosting an input predetermined frequency band signal and outputting a direct-current (DC) voltage signal; a wake-up determiner comparing a voltage of the DC voltage signal output from the input unit with a predetermined reference voltage and outputting a HIGH signal or a LOW signal; and a switch stopping power supply to the high RFID tag if the wake-up determiner outputs the LOW signal.

Claims

1. An apparatus for stopping power supply to a radio frequency identification (RFID) system, the apparatus comprising:

a power supplier supplying power to a high RFID tag;

an input unit rectifying and boosting an input predetermined frequency band signal and outputting a direct-current (DC) voltage signal;

a wake-up determiner comparing a voltage of the DC voltage signal output from the input unit with a predetermined reference voltage and outputting a HIGH signal or a LOW signal; and

a switch stopping power supply to the high RFID tag when the wake-up determiner outputs the LOW signal.

2. The apparatus of claim 1, wherein the wake-up determiner comprises:

a comparator comparing the voltage of the DC voltage signal output from the input unit with the predetermined reference voltage.

3. The apparatus of claim 1, wherein the wake-up determiner is an OR gate.

4. The apparatus of claim 1, wherein the input predetermined frequency band signal comprises a command of a RFID reader.

5. The apparatus of claim 1, further comprising:

a demodulator reading the command of the RFID reader;

a controller executing the read command; and

an output unit outputting the result of executing the command of the RFID reader,

wherein if the wake-up determiner outputs the HIGH signal, the command of the RFID reader is executed.

6. A method of stopping power supply to a RFID system, the method comprising:

rectifying and boosting an input predetermined frequency band signal and outputting a DC voltage signal;

comparing a voltage of the DC voltage signal output from the input unit with a predetermined reference voltage and outputting a HIGH signal or a LOW signal; and

stopping power supply to the high RFID tag if the wake-up determiner outputs the LOW signal.

7. The method of claim 6, wherein the input predetermined frequency band signal comprises a command of a RFID reader.

8. The method of claim 6, wherein the HIGH signal or the LOW signal is output by an OR logical operator.

9. The method of claim 7, further comprising:

reading the command of the RFID reader;

executing the read command; and

outputting the result of executing the command,

wherein if the HIGH signal is output, the command of the RFID reader is executed.