The following is a very basic driver circuit for one phase of a DC brushless motor. The input varies between -10V to 10V for a current between -2A to 2A. The amplifier is a power opamp from PowerAmp.
Why the difference?
I wanted to get rid of the resonance at 10kHz which could be responsible for too much ripple due to noise being amplified, by trying out a few locations for a capacitor when I noticed this.