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Subject: Re: 1V voltage reference

Date: 07/06/00 at 11:13 PM
Posted by: Louis Humble
E-mail: louishumble@yahoo.com
Message Posted:

In Reply to: Re: 1V voltage reference posted by Dominique Bovey on 07/05/00 at 10:50 AM:

hi,

I still have the 2nd question.

I need to have a voltage scaling circuit at the input of the D/A converter to scale the 5V logic from the binary counter to 1V logic. I am thinking of using a simple voltage divider to do the scaling, but that will affect the maximum speed (which is an important parameter
that I want to test) of the D/A converter.
If I use the same technique (a voltage follower) as in the 1V voltage reference, then I will need to have 8 op amps at the input to the DAC. And I don't know what combined effect of the voltage divider and the voltage follower will have on the speed of the binary counter. Can anyone give me some suggestion or advice?

Many thanks in advance.

rgds,

Louis


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