Hi,
Actually I tried using LM339 with pull-up resistors, voltage comparator, for the generating of PWM signal instead of TL072. However, the waveform that I got is quite weird. [ Ramp up on the rising edge, straight down on the falling edge, Refer to LM339(1) & LM339(2) ]
Therefore, I changed back to TL072 which gave me the same results as previous week. [Refer to TL072(1) & TL072 (2)]
After I connect my TL072 to the IR2113, I measured the waveform at the Hin and Lin Pin of IR2113.
Which is the part I am currently stuck at. [Refer to Hin.jpg]