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Subject: Opamp temperature compensation (variometer)

Date: 06/14/01 at 6:56 AM
Posted by: Cosmin Buhu
E-mail: cosminb@warpnet.ro
Message Posted:

I need for a variometer (vertical speed indicator) a
solution to compensate temperature drift of the opamps.
I use quad MCP604 (Microchip), these have 2,5uV/Celsius. With
a 2000 gain will give 2,5 mV/Celsius, totaly inacceptable.
I have a remaining opamp in the capsule, I must do the compensation
with it and as minimum components possible (no thermistor, etc.).
I must use these opamps, I can't buy anything else.
For Adrian Mills: How do you accomplished this task ?

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