[sdiy] Voltage References
David G. Dixon
dixon at interchange.ubc.ca
Thu Jun 9 05:44:19 CEST 2011
> Any favourite methods of generating +/-10V reference voltages from a
> +/-15V supply? Looking to keep component count down.
If you're not too concerned with absolute precision, and your PSU is rock
steady, then a buffered divider and an inverter are all you need. Put a
small-value trimmer in the middle of the divider for precision.
If PSU drift or temperature compensation are concerns, then you should use a
precision 10V voltage reference such as REF01 or REF102. REF01 is cheaper
and less precise than REF102, with a slightly higher tempco. Both models
can be trimmed externally. Slap it through a precision (trimmed) opamp
inverter and you've got precision +10 and -10V references with minimal parts
More information about the Synth-diy