i already have a good and perfectly working square wave inverter. all i need is a filter and shaping circuitry with which i can shape the output to become a sine wave inverter. pls help! i need a sine wave inverter circuitry.
A square-wave inverter circuit is extremely simple.
A sine-wave inverter is fairly complicated.
If you filter a square-wave inverter then most of its power will heat the filter and the output power will be very low.
A sine-wave inverter is made with a fairly high frequency Pulse-Width-Modulation circuit. It has many "steps" that are easy to smooth with a small low loss filter.