Re: Op amp vs. comparator

On 11 Sep 2006 09:59:27 GMT, Robert Latest <boblatest@xxxxxxxxx>
wrote:

On Fri, 8 Sep 2006 13:17:23 +0000 (UTC),
Ken Smith <kensmith@xxxxxxxxxxxxxxx> wrote
in Msg. <edrqh3$jdv$1@xxxxxxxxxxxxxx>

I think I just came up with an idea dumber than making a comparitor with
clamp diodes.

What's the problem with clamp diodes in a comparator?

robert

They can clamp the input and/or the reference! My inputs are often
capacitor+current source ramps, and my references are often dacs. They
don't like being coupled to one another. And sometimes one signal
feeds more than one comparator, so think about the consequences of
that one.

John

.

Relevant Pages

  • Re: Op amp vs. comparator
    ... What's the problem with clamp diodes in a comparator? ... OTOH I wonder what would be the consequences of zenering the input ... differential voltage spec, but they didn't give me that choice. ...
    (sci.electronics.design)
  • Re: Op amp vs. comparator
    ... What's the problem with clamp diodes in a comparator? ... capacitor+current source ramps, and my references are often dacs. ...
    (sci.electronics.design)
  • Re: Op amp vs. comparator
    ... in Msg. ... What's the problem with clamp diodes in a comparator? ...
    (sci.electronics.design)