The problem with these easy inverters are that both side switches turn on before the other switch turns off.
The problem is because of the use of the multivibrator circuit as the oscillator this needs to to start charge one side before the other discharge in order to keep oscillating forever.
And that is this circuit fixing with an extra transistor and resistor to keep the other switch Base or Gate off until the other turns completely off (the startup part of the oscillator is also a most in these case to prevent it from happening also at startup).
The delay between the switches may change with deference in the transistors used base saturation voltage.
The lower the base saturation voltage the wider the delay.
The transistors used collector saturation voltage cannot be higher than the Base or Gate off the switches that they have to keep off in order for them to work.
These fixes only works with the PNP main oscillator circuit! Sorry 😔 don't waste your time trying to do it with NPN oscillator, for those who don't know op-amp circuits use PNP for this same advantage over NPN in circuits ware they cannot be used.
The 330ohm resistors resistance value changes the pulses wide (PWM) lower the resistance wider the pulse wide and higher the slim.
I added the tranformator only to visualize the Modefy Sine Wave ,anything driven by those output Fet's is your problem!
Notice most Fet's Gate voltage is more or less 10Volt full saturation and i used 5Volt in the circuit because of the PNP transistors Emeter-Base breakdown voltage 😑 be warned that the oscillator operating voltage must be onder these voltage, in my case it was 8Volt breakdown so i use 5Volt because of the changes in charge of the capacitors behind the Emeter of the PNP transistors and the other Base.
I added 2 mechanical switches to make easy visualization of the error!
Warning; these online circuits don't have any high voltage transformator side 100+ or 200+ voltage regulation and i did not add one because of
1: not the purpose of this circuit
2: there is more than one way to do that
3: if you don't already know how to do that yourself don't use these online circuits
