Patent ID: 8165193

Claim:
A method for wireless data transmission between a base station and a passive transponder by inductive coupling, the method comprising: transmitting data from the base station to the transponder via a first data transmission protocol type and via at least one second data transmission protocol type; and selecting the first or the at least second data transmission protocol type by writing a configuration register in the transponder; wherein in the first data transmission protocol type and in the at least second data transmission protocol type the base station transmits a carrier signal with a frequency within a frequency range from 50 KHz to 250 KHz, wherein a data transmission is initiated by the base station by generating a field gap of the carrier signal, wherein, characters, transmitted by the base station to the transponder, are encoded by associated durations between temporally successive field gaps, wherein a first character value is assigned a first duration, and wherein at least one second character value is assigned a second duration.