# Why we gradually increase size of inverters in buffer design?

When trying to drive a high capacitive load why do we gradually increase size of inverters in buffer design. Why not give the output of a circuit to one large inverter?

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About progressive sizing ? –  BASIL VARGHESE Apr 2 '14 at 17:37
This question makes no sense without some context. –  Olin Lathrop Apr 2 '14 at 17:40
This comes from VLSI design, where very small transistors are used in internal logic but they must ultimately drive very large transistors in the output buffers. –  Joe Hass Apr 2 '14 at 18:21
@OlinLathrop I suppose you could take it that way, but at that point it seems like you're deliberately going out of your way to be confused. The information he provided does not make sense in the contexts you suggested, but it is sufficiently clear (and makes sense) for IC design. –  W5VO Apr 2 '14 at 19:48
@W5VO: But IC design was never mentioned. Actually when I read the question, my first thought was inverters that make AC from DC, since I just had a recent questions about them on my mind. I'm not a IC designer, so the IC design context never occurred to me. If the OP had mentioned IC design, I would have no problem with this question and would have simply skipped it knowing it was not for me. –  Olin Lathrop Apr 2 '14 at 20:01