| 摘要 |
The transmitter generates a current signal typical of the data to be transmitted, as a load current of a specific load resistance. To transmit this current signal, the load resistance is connected for a short time to a voltage source, with the result that a series of current pulses (I) is produced. The times of generation and/or the duration of these current pulses are chosen so that the resulting transmitted signal corresponds at least approximately to a desired theoretical signal (R). The method is very flexible with regard to the frequency of the current signal, and the transmitter requires neither amplifiers nor tuned resonant circuits which play a role in determining the transmission frequency. The method is particularly suitable for transmission, to a central unit, of data concerning, for example, the counter reading from counters distributed over the network or concerning the executed command from ripple control receivers.
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