> I need to convert a 0V to +5V DC signal to a +0.3V to +10V signal.

Is the signal continuously variable in the range 0 to 5v OR is it only at
either 0 or 5 volts (except during transitions). ?

This answer makes a large difference to the solution.
Continuosly variable - use an op amp as people have advised.
Only at one of 2 values - use a suitably designed transistor inverter.



        RM

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