I had a thought this morning about creating a simple DC to AC converter (simplified schematic attached).
Given a regulated +5V/-5V bipolar supply, imagine the switch symbols are MOSFETs controlled by an MCU that alternately switched from positive/negative rails at near zero-crossings (detected with a window-comparator at the output node indicated by "sine?").
Since the charge/discharge time-constant would vary depending on load, the size of the output capacitors (maybe additional Rs) would have to be "tuned" to be application specific.
Any reason why this would be a bad idea? I realize it would take some tweaking to get low crossover distortion.
I also realize there are ICs that could help do this more efficiently, but just as an educational experiment, could this work? Or is it a terrible idea?
Thanks!
Given a regulated +5V/-5V bipolar supply, imagine the switch symbols are MOSFETs controlled by an MCU that alternately switched from positive/negative rails at near zero-crossings (detected with a window-comparator at the output node indicated by "sine?").
Since the charge/discharge time-constant would vary depending on load, the size of the output capacitors (maybe additional Rs) would have to be "tuned" to be application specific.
Any reason why this would be a bad idea? I realize it would take some tweaking to get low crossover distortion.
I also realize there are ICs that could help do this more efficiently, but just as an educational experiment, could this work? Or is it a terrible idea?
Thanks!