| 摘要 |
The threshold-type detection device comprises: a capacitor (C1) having a terminal linked to the input (+) of the comparator (COMP) and the other terminal linked to earth, the said capacitor (C1) being able to be charged via a resistive potentiometric divider (R2) by a portion of the voltage of the signal to be detected (SI), the voltage of the reference signal thus corresponding to the voltage of the portion of the signal to be detected filtered by the resistive potentiometric divider (R2) and loaded into the capacitor (C1), in response to the envelope detection signal in the active state. In the presence of the envelope detection signal (DES) in the inactive state, corresponding to the switch (COMU1) being in the open state, the capacitor (C1) discharges through a resistor (R1) one terminal of which is linked to the capacitor (C1) and the other terminal of which is linked to earth. <IMAGE>
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