Complex sentence: Wien bridge oscillations are closely related to relaxation oscillations as both are based on charging and discharging of a capacitor but in contrast to them, they have a smooth shape at the sine peaks since the amplifier does not change significantly its output voltage at these points.
Split into simpler sentences: Wien bridge oscillations are closely related to relaxation oscillations as both are based on charging and discharging of a capacitor. In contrast to them, they have a smooth shape at the sine peaks since the amplifier does not change significantly its output voltage at these points.