Transponder having a clock supply unit

• US 20060006985A1
• Filed: 07/05/2005
• Published: 01/12/2006
• Est. Priority Date: 07/06/2004
• Status: Abandoned Application

• Current Assignee: Atmel Germany GmbH (Microchip Technology Incorporated)
• Original Assignee: Atmel Germany GmbH (Microchip Technology Incorporated)
• Inventors: Ziebertz, Dirk
• Application Number:
  US11/172,981
• Publication Number:
  US 20060006985A1
• Time in Patent Office: Days
• US Class Current: 340/10.100
• 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: G06K 19/0726 the arrangement including a circuit for tuning the resonance frequency of an antenna on the record carrier

Abstract

A transponder is provided with a clock supply unit that includes a ring oscillator and can be used in RFID systems.

Claims

1. A transponder having a clock supply unit, the clock supply unit including a ring oscillator.

2. The transponder according to claim 1, wherein the ring oscillator is has source-coupled logic technology.

3. The transponder according to claim 1, wherein the transponder further comprises a frequency control unit, which, depending on a clock frequency to be set, sets an operating parameter of the ring oscillator.

4. The transponder according to claim 3, wherein the operating parameter is a bias voltage of a source-coupled logic module.

5. The transponder according to claim 1, wherein the ring oscillator comprises at least one inverter which is configured as a NAND gate or NOR gate.

6. The transponder according to claim 1, wherein the ring oscillator comprises an activation element for activating and deactivating the ring oscillator.

7. The transponder according to claim 6, wherein the activation element is a NAND gate.

8. The transponder according to claim 6, wherein a synchronization unit is coupled to the activation unit.

9. The transponder according to claim 1, wherein the transponder is a passive or semipassive transponder.