I have been researching methods for converting a square wave into a sine wave, but I cannot seem to reach a conclusion. Is it possible to preserve the amplitude and frequency of a square wave when using a LPF with cascaded RC filters? I found the formula \$f_c = 1/(2\pi*R*C) \$ but this does not give me the output I need.
Below I tried using a 50 Hz input to get a 50 Hz output. Generally, my input is between the range of 50 - 60 Hz. I need to preserve amplitude because the AC signal will power some valves on a rocket that need 150 VAC w/ <= 1.5 amps.