Integrated circuit and method to secure a RFID tag

• US 7,940,184 B2
• Filed: 08/14/2008
• Issued: 05/10/2011
• Est. Priority Date: 08/14/2008
• Status: Active Grant

• Current Assignee: John William Jr. Spivey
• Original Assignee: John William Jr. Spivey
• Inventors: Spivey, John William Jr.
• Primary Examiner(s): Lieu; Julie
• Application Number:
  US12/228,616
• Publication Number:
  US 20100039265A1
• Time in Patent Office: 999 Days
• Field of Search: None
• US Class Current: 340/572.8
• 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

Abstract

A method to secure RFID card information consisting of a piezo electric element coupled to a transistor which is coupled across the antenna leads of a RFID tag, the transistor provides a short circuit or and open circuit across the antenna leads or antenna input leads of a the RFID chip. The transistor when not energized provides a short circuit on the RFID antenna. When the transistor is energized by a piezo electric element the short circuit is removed and the RFID chip can transfer data normally. Furthermore, the present invention includes a single integrated circuit package, being a single integrated transistor RFID chip package based on the transistor circuit design to operate specifically with a piezo electric element when used with a RFID tag.

Claims

1. An integrated circuit to secure an RFID Tag comprising:

a piezo electric element being retained by the flexible material of a RFID tag, said piezo electric element being an energy source for supplying energy to power a transistor; and

a transistor having outputs coupled to the antenna leads or to the antenna inputs termination point of a RFID chip, whereby the transistor when not energized applies a short circuit between at the antenna leads or at the RFID chip antenna termination leads.

2. The integrated circuit in said claim 1, wherein in the piezo electric element capable of supplying energy to the transistor input when said piezo electric element is bent or deflected releasing said energy, said transistor is energized and the short across the RFID antenna leads and or at the RFID chip antenna termination leads creates an open circuit condition.

3. The integrated circuit in said claim 2, said open circuit condition occurs at the transistor output leads that are connected and coupled to the RFID antenna leads or at the RFID chip antenna termination leads, when said open condition of said transistor occurs the RFID antenna is capable of being energized by a RFID tag reader and said RFID tag will be capable of transferring information data to a RFID reader.

4. An integrated circuit to secure an RFID Tag comprising:

a flexible piezo element capable of being bent and or deflected to release energy capable of energizing; and

a transistor which output leads are coupled to at least one of the RFID antenna leads, said transistor providing a short circuit across the RFID antenna leads when said transistor is not energized and an open circuit when energized by said piezo element.

5. The integrated circuit in said claim 4, wherein said short circuit of the RFID antenna is created by said transistor when switched on, wherein a piezo electric element provides the energy to the transistor to cause an open circuit condition at the RFID antenna leads, and wherein the open circuit condition then allows the RFID chip and antenna to operate normally to transfer information to a RFID reader.

6. An integrated circuit and method to secure an RFID Tag comprising:

an RFID integrated circuit containing a transistor in a single package die;

said RFID integrated circuit having an output pin electrically coupled to the gate of the transistor, said transistor source and drain electrically coupled to the RFID IC antenna leads, said integrated circuit package having two leads for being coupled across a piezo electric element as a power source for said integrated circuit package.