"TonyL" wrote in message
...

The reason is that I need multiple inputs *and* outputs from that star
point. It seems that either:

a) I can have any (reasonable) number of inputs connected to a single
virtual ground summer as the output device. A standard mixer. In other
words a star point with multiple inputs and one output.

OR

b) I can have a single input device with any (reasonable) number of
outputs using op-amps configured as high input impedance buffers. A star
point with one input and multiple outputs.

Both a) and b) work fine seperately. Is there any way to combine both ?
I'm beginning to think not...


No. As you must be beginning to realise, it's not. You can have a common
star point if it's not a virtual ground star point, but then you get a
variation in gain depending on the number of inputs connected. There's no
other option I'm afraid.


David.