I wonder if is it possible to do something similar to what is proposed here
https://www.electro-tech-online.com/threads/pwm-signal-to-lm317-to-adjust-voltage-output.125091/
but this time to get two control signals: one from 0 to +33V to control an LM317 and another from 0 to -33V to control an LM337.
I imagine two separate opamps, one powered between 0 and +38V and the other between -38V and 0V. (I have those +/-38V DC available from an old power supply).
What could be the most suitable opamps?
Searching through Farnell I can at least compare some but the prices of the suitable(?) ones is scary. To come to my hands I have to think of them multiplied around 4 times!!
Maybe I am overlooking something...
Any suggestions? Gracias
https://www.electro-tech-online.com/threads/pwm-signal-to-lm317-to-adjust-voltage-output.125091/
but this time to get two control signals: one from 0 to +33V to control an LM317 and another from 0 to -33V to control an LM337.
I imagine two separate opamps, one powered between 0 and +38V and the other between -38V and 0V. (I have those +/-38V DC available from an old power supply).
What could be the most suitable opamps?
Searching through Farnell I can at least compare some but the prices of the suitable(?) ones is scary. To come to my hands I have to think of them multiplied around 4 times!!
Maybe I am overlooking something...
Any suggestions? Gracias