| 摘要 |
<p>The detector involves an electronic circuit for analysing the signals transmitted by a data sensor and for delivering a control signal when these signals cause an aperiodic variation to appear in the electrical signal received by the said circuit. The device consists of a differentiating circuit (6), a high gain DC amplifier (9), a regulating system for adjusting the operating point of the amplifier (7 and 8), a frequency-stabilized reference signal generator (12), a control system for injecting the reference signal (10 and 11), a frequency comparator (13), a filter (14) and a threshold detector (15). <IMAGE></p> |
