Re: Better op-amp buffer configuration?

billcalley <billcalley@xxxxxxxxx> wrote:

> Hi All,
>
> I realize that using a single-supply op-amp as a buffer may be one
> of the easiest circuit configurations in the world; just tie the
> chip's output back to the inverting input, and insert the signal into
> its non-inverting input. That's how the books show it anyway, but
> are their any real-life op-amp issues that I have to look out for with
> this basic circuit? Anything I can do to make this circuit operate
> better under temperature, along with the unavoidable op-amp variations?
> Perhaps to help with any stability or voltage offset issues? Or is
> this circuit simply the way op-amp buffers are done, even in real life?

Check whether the chosen op-amp needs external compensation to be
unity-gain stable (the NE5534 does).

Check whether a resistor may be needed in series with the output to
prevent problems if you are driving a capacitive load such as a long
screened cable.

--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk
.

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