Low-Frequency RFID in a Nutshell - Texas Instruments
ApplicationReportSWRA284 September2011Low-FrequencyRFIDina ,howtochoosetherightcomponents,andshowsb estpracticesfora guidelinefordesigninga RFIDStickAntennaNeara (4ms/div)............................... .......................................3 3ProgramPageCommandWithCorrectBCCandResp onse(10ms/div).......................... .................44ProgramPageWithIncorr ectBCCandNoResponse(10ms/div)........... .......................................4 5PPMTimingfora September2011Low-FrequencyRFIDin a NutshellSubmitDocumentationFeedbackCopyr ight 2011,TexasInstrumentsIncorporatedBase Station AntennaTransponder (LF)RFcommunicationtotherightpassivecomp onentsandfinallytoa (poweredbythemagneticfieldofa RFIDreader)is chargephasein whicha capacitoris charged(TIhalfduplex(HDX)principle).
Charge VCL Capacitor Read Page Command Response VCL Limit = 6 V Reached www.ti.com Low-FrequencyRF Communication The RF voltage is the voltage that is generated by the magnetic field of the RFID base station at the
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