Machine-translated by Google. Questions are authored in English.
Top

Discussion

Why is that gain accompanied by a very low open-loop bandwidth?

  • A.The output stage limits the response at high frequency
  • B.Dominant-pole compensation makes it unity-gain stable
  • C.The input devices cannot be operated at high frequency
  • D.The gain is taken in too many cascaded stages

Answer: B

An internally compensated device has one pole placed deliberately at a few hertz so that the gain has fallen to unity before any second pole contributes phase, which makes it stable at any closed-loop gain down to one. The devices are perfectly capable at higher frequencies, and neither the stage count nor the output stage is the limitation. The pairing of enormous gain with a tiny bandwidth is a deliberate design choice rather than a shortcoming, and the product of the two is what the user actually buys.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.