| 摘要 |
In certain bidirectional transmissions, differential links (L, L*) are used and transceivers (1) that furnish differential measurement signals (V, V*) representative of the transmission signals of the remote station are used. To reduce power consumption, the electrical power to the transceivers (1) may be interrupted during periods of inactivity. The method of the present invention consists in determining a threshold value which is intermediate in value between the maximum and minimum values that can be assumed by the measurement signals (V, V*), and furnishing a signal (VAL) representative of transmission activity resulting from the comparison between the measurement signals (V, V*) and the threshold value. The circuit for employing the method uses voltage comparators and may be an integrated circuit.
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