| 摘要 |
A method and a device ( 1 ) for detecting signal amplitudes by removing any DC component from the signal and then shifting the signal by a shift amount so as to produce a shifted signal having a first signal level equal to a reference level (Vref). The shift amount provides an indication of the amplitude of the signal. To this end, the device ( 1 ) includes a decoupling circuit ( 2 ), a shift circuit ( 3 ) and an output terminal ( 4 ). Optionally the device further includes a differential amplifier ( 5 ) coupled to receive the reference level (Vref) and an indication of the power of the shifted signal, and a signal power determination circuit ( 6 ) coupled between the shift circuit ( 3 ) and the differential amplifier ( 5 ).
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