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Subject: Re: 1V voltage reference

Date: 07/05/00 at 10:50 AM
Posted by: Dominique Bovey
E-mail: dbov@vmfr.vibro-meter.ch
Message Posted:

In Reply to: Re: 1V voltage reference posted by louis on 06/20/00 at 8:12 PM:

Hi Louis,
I put my grain of salt in the discussion...
I think you are right with your divider but the output voltage of the divider has to be amplified.
So that you can provide whatever suitable current to your DAC with the 1V voltage being stable.
To do that you have to use an op amp connected in non-inverting unity gain buffer:
enter the divider voltage on the positive input , connect the output and the negative input
together, power the op amp with suitable voltage (if you take a "rail to rail input" type you can
power it with +5V on the +V and 0V on the -V pin, other wise you may have to use a +5V and
-5V supply.

Hope it helps,
bye for now
Dominique


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