I'm looking at using two LT1082 (datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/1082fas.pdf) to generate a +50V and -50V signal and then use transistors to control this with the Arduino with an inverter logic gate. I need about 20 mA.
I don't know much about logic gates. I believe the gist of an inverter is that when the Arduino runs low, the logic gate runs high. So if I'm using 50% PWM, the BJT coupled to the Arduino (+50V) runs high when Arduino is high, and the BJT coupled to the inverter (-50V) runs high when Arduino runs low, producing square wave AC.
If this is correct, I have three major questions:
How do I set the voltage on the LT1082? I can't tell from the data sheet.
How do I choose an inverter?
I'm going to use an NPN BJT for the positive voltage; do I need a PNP BJT for the negative voltage because of the different sign, or do I just hook the NPN up backwards?
Thanks for your help.