Method for detecting and communicating with RFID memory devices
This invention relates to a system of communicating with a radio frequency identification (RFID) transponder microchip (IC) for the purpose of accessing pre-programmed data. Such system involves direct electrical contact between the system reading the data from the memory in the transponder IC and the IC itself via two mechanical contact points. This system provides an interface with a transponder IC in order to energize the IC. Once the presence of the transponder IC is detected, the host system can read or write to and process preprogrammed data stored in the IC.
1. A method of communication with an RFID transponder integrated circuit (IC) comprising:
interrogating, using a primary host system, an RFID transponder IC through conductive contacts, wherein:
the interrogating comprises emulating an over-the-air RFID interface; and
the RFID transponder IC is removably connected to the primary host system through the conductive contacts.
2. The method of claim 1 , further comprising detecting the RFID transponder IC.
3. The method of claim 1 , further comprising providing power to the RFID transponder IC from the primary host system, wherein the RFID transponder IC is a passive RFID transponder IC.
4. The method of claim 1 , further comprising receiving device information from the RFID transponder IC.
5. The method of claim 4 , wherein the device information is pre-programmed.
6. The method of claim 1 , further comprising monitoring a connection status of a connectable portion including the conductive contacts.
7. The method of claim 6 , wherein monitoring comprises monitoring the voltage between the conductive contacts.
8. The method of claim 6 , wherein monitoring comprises continuously polling the RFID transponder IC.
9. The method of claim 6 , wherein monitoring comprise monitoring using a voltage comparator.
10. The method of claim 1 wherein said primary host system comprises a microprocessor, an interrogator IC, a power source, an antenna matching circuit, and a transponder matching circuit.
11. The method of claim 1 , wherein interrogating comprises interrogating using an interface cable that connects a connectable portion including the conductive contacts and the primary host system.
12. The method of claim 1 , wherein the primary host system comprises a microprocessor.
13. The method of claim 1 , wherein the primary host system comprises an antenna matching circuit.
14. The method of claim 1 , wherein the primary host system comprises an interrogator IC.
15. The method of claim 1 , wherein the primary host system comprises a transponder matching circuit.
16. The method of claim 1 , wherein interrogating comprises communicating between the primary host system and the RFID transponder IC in a frequency band selected from the group consisting of the low frequency (LHF) band, the high frequency (HF) band, and the ultra-high frequency (UHF) band.
17. The method of claim 1 , wherein the RFID interrogator IC is coupled to a carrier.
18. The method of claim 17 , wherein information related to the carrier is stored as a data string in the RFID transponder IC, and wherein the information is selected from the group consisting of a lot code, a connection portion serial number, a shelf life code, an OEM code identifying the distributor of a connectable portion including the conductive contacts, a usage counter indicating the number of uses remaining, and any combination thereof.
19. The method of claim 17 , wherein the carrier contains a ground guard conductor that is utilized by the primary host system to monitor current flow from the conductive contacts to at least one electrical connection to a patient.
20. The method of claim 1 , wherein the primary host system comprises an electrophysiological monitor containing at least one electrical connection to a patient.
21. The method of claim 1 , wherein the primary host system comprises a medical device and wherein the RFID transponder IC comprises programmed data, including one or more of configuration information, calibration information, and personal patient data, for use by the medical device.