| 摘要 |
<p>A data carrier (1) for receiving an amplitude-modulated carrier signal (TS) comprises rectifier means (5) and voltage limiting means (8) for limiting the d.c. supply voltage (V) that can be generated by the rectifier means (5), the voltage limiting means (8) having a delayed response to amplitude variations in the received carrier signal (TS) in order to avoid adverse effects on the modulation percentage of the carrier signal (TS), and having an undelayed and, consequently, rapid response to excessive amplitude values of the carrier signal (TS), which would give rise to an excessive d.c. supply voltage (V) for circuit elements (12, 13, 15, 16, 18) of the data carrier (1).</p> |
