Re: summing amplifier with linear offset

I sorry in advance if I've double posted.

Hi all,

Thanks very much for your advice; this is the circuit I've designed ->
http://www.geocities.com/aine_canby/atten.gif

The 15 volt rails are from a regulated source. I wasn't sure about
what resistance to choose for Remit, does 1k sound OK? I also haven't
buffered the AC signal, again does that sound reasonable?

I'm now getting a linear response when the POT (1K) is adjusted, from
about 0 Volts to 1.411 Volts, which I'm happy with.

The output from my circuit will be used to drive a constant current
driver. This driver converts an input voltage to a current. I need to
ensure that I only apply between 0 Volts and 1.6Volts to this driver,
otherwise I will get a current which will damage the equipment I'm
driving. Is there such a this as a 1.5 or 1.6 Volt Zener? Any other
suggestions with regard to this issue?

Thanks again for your help,

Aine.