Hello I need to make a circuit taking a 0V to5V signal with signal common to a linear 0V to 10V. 2:1. I have tried a LM324A op amp single source +15V and power common with the correct feedback Voltage divider to get the output i am looking for. I thought i might be able to use the signal common as the ground for the inputs and feedback for the 2 to 1 gain I need, but i get nada at the output using signal common as the reference. I setup a voltage divider with a couple of 50K pots from 15V supply and power common for a variable input on my non inverting op amp + input circuit, and it works great. Any suggestions on how to do this with my input voltage where the signal common is separate from the power common?

 

Way too many possible circuit combinations for text. This is an electrical engineering forum; we don't burp without a schematic. Please post yours.

ak