Power saving method

{
  "publication_number": "US2012038464A1",
  "country": "US",
  "kind": "A1",
  "title": "Power saving method",
  "abstract": "The invention relates to a method for saving power especially for tag talks first data transmission in radio frequency identification (RFID) systems including a tag containing a non-volatile memory, a digital block and an analogue block and a static random access, wherein the data of the non-volatile memory are prefetched from the non-volatile memory into the digital block and the tag talks first data will be stored in the static random access memory embedded in the digital block.",
  "claims": [
    "1. Method for saving power especially for a tag talks first data transmission in a radio frequency identification system including a tag containing a non-volatile memory, a digital block and an analogue block and a static random access memory (RAM), wherein tag talks first data of the non-volatile memory are prefetched from the non-volatile memory into the digital block and the tag talks first data will be stored in the static random access memory embedded in the digital block to allow switching the non volatile memory into power down mode during the tag talks first data transmission. 2. Method according to claim 1, wherein the non-volatile memory will be put into a power down mode during the tag talks first data transmission. 3. Method according to claim 1, wherein the digital block will be operated at a voltage which is lower than the voltage applied to the non-volatile memory. 4. Method according to claim 1, wherein at least at the beginning a reader field is switched off and a tag talks first mode is low and a read status of the non-volatile memory is low. 5. Method according to claim 1, wherein at a predetermined point in time a reader field will be switched on. 6. Method according to claim 1, wherein at a further predetermined point in time the RFID system reads chip configuration data and stores them into the static RAM. 7. Method according to one of the preceding claims claim 1, wherein at a further predetermined point in time the RFID system reads the tag talks first data and stores the data into the static RAM. 8. Method according to claim 1, wherein at a further predetermined point in time and after the reading and storing process has been finished, a tag talks first mode will be activated by starting the tag talks first data transmission. 9. Method according to claim 1, wherein at a further predetermined point in time when the tag switches from power up mode into a tag talks first operation, the non-volatile memory can be switched into power down mode. 10. Method according to claim 1, wherein furthermore the tag talks first data will be provided by the static RAM during reply modulation of the process. 11. RFID tag containing the non-volatile memory, the digital block and the analogue block and the static random access memory according to claim 1."
  ],
  "cpc": [
    "H04W 52/0283",
    "Y02D 30/70"
  ],
  "assignees": [
    "STROMBERGER GUENTER",
    "NXP BV"
  ],
  "filing_date": "2009-11-10",
  "publication_date": "2012-02-16",
  "priority_date": "2009-03-24",
  "application_number": "US-200913258325-A",
  "family_id": "40921985",
  "citations": [
    "US2003097302A1",
    "US2006128348A1",
    "US2008094180A1",
    "US2008136603A1",
    "US2009045916A1",
    "US2010250875A1",
    "US5781782A",
    "US7423517B2",
    "US7689172B2"
  ]
}