Are you just looking to combine two signals together or are you
looking for mathematical accuracy of the summed voltage?

There are several different main combiner designs, some of which
sacrifice overall amplitude for broad bandwidth, while others have
almost no losses but only work over a narrow bandwidth.

Sean

On Wed, Oct 17, 2012 at 10:14 AM, Martin K <martin@lkeng.org> wrote:
> I'm looking for an opamp adder in an eval board or "black box" that I
> can use to add (not mix) two RF signals of between about 80 and 150
> MHz.
>
> I know I could build one using any number of available opamps but I'm
> looking for a proven design that I don't have to analyze/verify
> myself.
>
> Thanks.
> -
> Martin K
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