I am familiar with the operations of a boost converter. However, i came across this circuit called a quadratic boost converter and i haven't really understood it.
When the Switch is ON (Mode), diode 3 is reverse biased because its anode is at at ground potential, while its cathode is below ground.
But i don't see why diode 1 is reverse biased too.
Similarly, when the Switch is OFF (Mode 2) , diode 2 is reverse biased and i don't understand why.


When the Switch is ON (Mode), diode 3 is reverse biased because its anode is at at ground potential, while its cathode is below ground.
But i don't see why diode 1 is reverse biased too.
Similarly, when the Switch is OFF (Mode 2) , diode 2 is reverse biased and i don't understand why.


