Discussion
Diagonal clipping in an envelope detector is caused by
Answer: D
It arises when the capacitor cannot discharge fast enough on the falling side of the envelope, so the output leaves the envelope on a straight diagonal line and the recovered waveform is distorted. Shortening the time constant cures it, at the cost of more carrier ripple. A low forward drop is desirable rather than harmful. Over-modulation distorts too, but by clipping the troughs symmetrically rather than diagonally. And gain affects level rather than the detector's ability to track.
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