The invention relates to a control circuit for an electronically commuted motor (120) with a power stage (122), comprising at least two semiconductor switches (216, 218) for control of the motor current. The semiconductor switches may be controlled by commuting signals. The control circuit comprises a current measuring body (170) for the generation of a motor current control parameter (I), dependent on the motor current, a base diode (240), arranged in series with the current measuring body and between the current measuring body and the at least two semiconductor switches and a motor current adjuster (180), which may be influenced by the commutation signal depending on the motor current control parameter.