In Reply to: 1V voltage reference posted by louis humble on 06/16/00 at 11:39 PM:
I think I misunderstood before, but let's look at it this way.
If you have a 1.242 volt reference which you can trust, using a divider of 1.07K on top and 4.42K on the bottom, resistors which are both standard RETMA values, you will get a nominal 0.999934426 Volts from the divider. (Yes, I kind of got carried away with the decimals!). That divided down voltage could then be fed into a high precision, unity gain voltage follower op-amp.
How stable this will be is mostly dependent on cost. Vishay for example, has some extremely stable resistors and high precision op-amps are offered by many companies. Perhaps you might start with Analog Devices.
John Dunn - President