| 摘要 |
The method involves changing a basic frequency of pulse width modulation signals to a predetermined deviating frequency for transmission of an additional information, where pulse width ratio of the pulse width modulation signals contains other information. The additional information are transferred by cyclic change of the frequency of the pulse width modulation signals from the basic frequency to the deviating frequency. Error and/or operating information are carried by the deviating frequency, where the basic and deviating frequencies are differ in its size around more than 20 percentages. |
