In an inverting op-amp with a DC output offset, clipping can be asymmetric.

In an inverting op-amp with a DC output offset, clipping can be asymmetric.

• A. Clipping cannot occur
• B. Clipping is asymmetric
• C. Clipping is symmetric
• D. Clipping occurs only at negative rail

Answer: (B)

Clipping happens when the output is pushed beyond what the supply rails can deliver. When there’s a DC offset at the output in an inverting stage, the entire waveform is shifted up or down. Real op-amps don’t swing exactly the same distance to the positive and negative rails, so that offset changes how much headroom the positive and negative excursions have. One side of the waveform can reach its rail sooner and flatten, while the other side still has some room, or vice versa. That mix of a shifted baseline and unequal rail headroom makes the clipping uneven, or asymmetric. The DC offset often comes from input offset voltage or bias currents, and in an inverting configuration that DC component is present at the output with the same gain, setting up the conditions for asymmetric clipping. If there were no offset and the rails were perfectly symmetric, clipping would be more symmetric; in practice, the offset and unequal swing cause the observed asymmetry.

Clipping happens when the output is pushed beyond what the supply rails can deliver. When there’s a DC offset at the output in an inverting stage, the entire waveform is shifted up or down. Real op-amps don’t swing exactly the same distance to the positive and negative rails, so that offset changes how much headroom the positive and negative excursions have. One side of the waveform can reach its rail sooner and flatten, while the other side still has some room, or vice versa. That mix of a shifted baseline and unequal rail headroom makes the clipping uneven, or asymmetric. The DC offset often comes from input offset voltage or bias currents, and in an inverting configuration that DC component is present at the output with the same gain, setting up the conditions for asymmetric clipping. If there were no offset and the rails were perfectly symmetric, clipping would be more symmetric; in practice, the offset and unequal swing cause the observed asymmetry.