| 摘要 |
<p>The pulse generator, used for a programmed traffic control unit, e.g. traffic lights, supplies output pulses in response to a given input signal containing HF interference signals. It comprises a switching device (A1) supplying an output which switches state when the signal applied to its input exceeds a given threshold. A capacitor (C1) is coupled to the input of the switching device (A1), with a second switching device (A2) controlling the capacitor charging in dependence on the input signal. A third switching device (A3) causes the output of the first switching device (A1) to be switched back to its original state upon an output pulse being supplied.</p> |
