| 摘要 |
An interface circuit serves to rectify excitation energy inductively coupled to a transistor acting in a diode configuration to charge a reservoir capacitor which may then serve as a power source. Switch means under the control of an external functional circuit block is arranged to bias the transistor into a reverse operating mode to itself act as a switch to discharge energy from the reservoir into the coupling. In this way pulses may be back coupled to be detected at the excitation source. The timing of the back coupled pulses may be information bearing.
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