Re: Supply dependent voltage reference?

MRW wrote:
Thanks all!

I was actually thinking about the voltage divider setup, too. But it
didn't occur to me that can connect the divider output to a voltage
follower opamp. Initially, I thought that using the voltage divider
alone may pose some loading issues if I'm pulling too much current. Is
this a right thought?


You are correct. Keep in mind that any loading (by taking current) presents an effective resistance to ground inversely proportional to the loading.

One thing; unless you are using an opamp designed for it, do NOT put a large amount (0.1uF is large) of capacitance on the output of the follower; it will probably oscillate due to loop instability.

Cheers

PeteS
.

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