Patent
Device for transmitting of binary data between a mobile data carrier and a stationary station
TLDR
In this paper, a device for transmitting binary data between a mobile data carrier (10) and a stationary station (11) is provided with a first resonance circuit (13) in the stationary station, whereby a switchable field effect transistor (25) is parallel switched to its condenser (17) by means of a switching pulse sequence.Abstract:
A device for transmitting of binary data between a mobile data carrier (10) and a stationary station (11) is provided with a first resonance circuit (13) in the stationary station (11), whereby a switchable field effect transistor (25) is parallel switched to its condenser (17) by means of a switching pulse sequence, a second resonance circuit (12) in the data carrier (10) which is at least conductively coupled for a short time with the first resonance circuit (13). For the purpose of enlarging the inductively to be bridged distances between the resonance circuits (12,13) of data carrier (10) and stationary station (11) without impairing the operating safety during the data transmission the resonance circuit (13) in the stationary station (11) is designed in such a manner that its resonance frequency is about equal to the switching pulse sequence. The data transmission from the data carrier (10) to the stationary station (11) is performed by amplitude demodulation in the data carrier (10) and by amplitude demodulation in the stationary station (11). The data transmission from the stationary station (11) to the data carrier (10) is performed by frequency demodulation, whereby the frequency ratio is adjusted to 2:1.read more
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Patent
Information transmission system
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