Device for data carrier detection
OwnerWalter Lechnerinventor
Life of this patent
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Abstract
A device for detection of the lateral position of a data carrier (2, 3) has a scanning unit (1) to read out data deposited on the data carrier by means of radio-frequency signals. For the detection of the position of the data carrier (2, 3) on the one or other side of an antenna pair (A1, A2), the scanning unit (1) has a circuit to determine the modulation depth (T1, T2) of the signals received from the data carrier (2, 3) by the two partial antennae (A1, A2).
Claims15
Device for the detection of the lateral position of a data carrier (2, 3) with a scanning unit (1) to read data deposited on the data carrier by radio-frequency signals and characterized in that for the detection of the position of the data carrier (2, 3) on one or the other side there is at least one pair of antennae consisting of two partial antennae (A1, A2), which are connected to the scanning unit (1), whereby the scanning unit (1) has a circuit for determination of the modulation depth (T1, T2) of the signals received by the two partial antennae (A1, A2) from the data carrier (2, 3).
Dependencies are inferred from the claim text.