| 摘要 |
<p>The device (10) has a variable gain stage (31) for adjusting the amplitude of an alternating modulated signal by multiplying the amplitude with a gain having two different values. A full wave rectifier stage (32) includes diodes (D3) to correct negative alternations of the adjusted signal while minimizing the influence of threshold voltages, to provide a rectified signal. An envelope detection stage (33) detects an envelope of the rectified signal, to deliver an envelope signal. A hysteresis comparator (34) compares the envelope signal with a comparison threshold, to restore a digital signal. An independent claim is also included for an electric equipment intended to be connected to an electrical energy meter.</p> |
