RADIO FREQUENCY IDENTIFICATION (RFID) SYSTEM

• US 20110063089A1
• Filed: 04/06/2010
• Published: 03/17/2011
• Est. Priority Date: 09/11/2009
• Status: Abandoned Application

• Current Assignee: Hynix Semiconductor Incorporated (SK Hynix Inc.)
• Original Assignee: Hynix Semiconductor Incorporated (SK Hynix Inc.)
• Inventors: KANG, Hee Bok
• Application Number:
  US12/755,247
• Publication Number:
  US 20110063089A1
• Time in Patent Office: Days
• US Class Current: 340/10.34
• 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: H04Q 2213/13095 PIN / Access code, authentication

Abstract

A radio frequency identification (RFID) system is disclosed. The RFID system connects a sense-signal generator to a power-supply voltage VDD input terminal of an RFID chip so that it detects a power-supply operation status of the RFID chip using sensory organs of a human being. The RFID system includes an RFID chip configured to perform a data read/write operation upon receiving a radio frequency (RF) signal from an antenna, and a sense-signal generator configured to output an operation status of the RFID chip by connecting to the RFID chip.

Claims

1. A radio frequency identification (RFID) system comprising:

an RFID chip configured to perform a data read/write operation upon receiving a radio frequency (RF) signal from an antenna, wherein the RFID chip is configured to be in one of a plurality of operation statuses; and

a sense-signal generator coupled to the RFID chip, the sense-signal generator configured to receive an operation status signal from the RFID chip and indicate an operation status of the RFID chip according to the operation status signal received.

2. The radio frequency identification (RFID) system according to claim 1, wherein the sense-signal generator is coupled to a power-supply voltage input terminal of the RFID chip.

3. The radio frequency identification (RFID) system according to claim 1, wherein the sense-signal generator includes a light emitting diode (LED) element.

4. The radio frequency identification (RFID) system according to claim 1, wherein the sense-signal generator includes a sound driving device.

5. The radio frequency identification (RFID) system according to claim 1, wherein the sense-signal generator generates any one of sense signals light, sound, vibration, temperature, smell, humidity, or a combination thereof.

6. The radio frequency identification (RFID) system according to claim 1, wherein operation status signal of the RFID chip indicates a status of a power-ON reset signal of the RFID chip.

7. The radio frequency identification (RFID) system according to claim 1, wherein the RFID chip includes:

a power-ON reset unit configured to generate a power-ON reset signal according to a power-supply voltage;

a switching controller coupled to the power-ON reset unit and configured to output a switching control signal by delaying the power-ON reset signal for a given time; and

a switching unit coupled to the switching controller and configured to drive the sense-signal generator according to the switching control signal,

wherein the switching unit is configured to provide the operation status signal to the sense-signal generator.

8. The radio frequency identification (RFID) system according to claim 7, wherein the switching unit is provided between the sense-signal generator and a ground voltage input terminal.

9. The radio frequency identification (RFID) system according to claim 8, wherein the switching unit includes an N-type Metal Oxide Semiconductor (NMOS) transistor.

10. The radio frequency identification (RFID) system according to claim 1, wherein the RFID chip enters a ready status when the sense-signal generator stops driving.

11. The radio frequency identification (RFID) system according to claim 1, wherein the RFID chip further includes an electrostatic discharge (ESD) circuit that is configured to receive the power supply voltage.

12. The radio frequency identification (RFID) system according to claim 11, wherein the ESD circuit is provided between a first node connected to a power-supply voltage input terminal of the RFID chip and a second node connected to a ground voltage input terminal.

13. The radio frequency identification system according to claim 12, wherein the sense-signal generator includes an input node coupled to the first node, and

wherein the power-ON reset unit is coupled to the first node to receive the power supply voltage.