Hey team,

I think I should be able to achieve this with amplifiers, but was struggling with the back end combination of a inverted amplifier and non inverting amplifier. I think this is a relatively common need so I was curious how you would suggest going about this? I think there are also some integrated solutions that can achieve a similar need. Both the +12 and -12V rails are already generated so we just need to track the 0-3.3V PWM signal into a +/-12V square wave. I wasn't readily finding a circuit in the analog cookbook and I was curious what y'alls thoughts were on this? 

This solution utilizes a comparator, but would require a voltage divider or secondary rail to create the comparison: https://electronics.stackexchange.com/questions/582696/how-to-generate-a-12v-to-12v-pwm-signal-from-0v-to-3-3v-or-5v 

This solution seems to use amplifiers, but it's unclear to me how they combine back in to one signal. https://www.electro-tech-online.com/threads/convert-0-3-3v-pwm-signal-to-12v-please-help.151953/ 

I'm not sure what paralleling a non-inverting and inverting amplifier would result in, but could definitely through it in pspice to find out. I feel I would also need a second to double check the gain equation for such a setup.

Anyway, curious if this is a common thing y'all run in to before I spend some more time on trying to figure it out!

Cheers,

Cam