I am currently building a half-bridge with IRF3205 MOSFETs and the IR2112 driver. I have built the circuit largely in accordance with the data sheet.I have used two capacitors connected in parallel between VB and VS– a ceramic capacitor (100 nF) and anelectrolytic capacitor (22 µF). There is also a 22 µF electrolytic capacitor between COM and VCC. In addition, I have integrated a 1N5819 diode betweenVCC and VB.Atthe gates of the MOSFETs, 10 ? resistors are installed. Asinput signals, I am using a signal generator with two channels forHIN and LIN, both with a frequency of 10 kHz.I am using a combination of a coil connected in series with acapacitor (22 µF), which in turn is connected in parallel to a 10 ohm resistor, as the load.The problem that is currently occurring is that the gate signals of the twoMOSFETs are not completely square-wave.

 

Sorry mate, no schematic, no possible insight.

 

Welcome to AAC!
Please post your schematic with all components labelled with their values, also a sharply-focussed pic of your actual circuit layout. It looks as though you have spurious oscillations, perhaps due to stray capacitance/inductance, layout or grounding issues. Scope grounding is important.
Is the layout on a breadboard?

 

A schematic = 1000 words also attach a picture.
Start at the two outputs of the signal generator. Are they OK?
It looks like you have oscillation, but it is hard to say with little information.
We need something like this with all the part numbers. "0.1uF 25V ceramic" Not copied out of a book but from what you built. So far almost no one builds from the datasheet without errors. Mark down voltages on the schematic, and waveforms if you can.