Abstract: The control circuit employs a controller having an I-member and a servo-motor whose rate of adjustment is limited and which is associated with a follow-up. The follow-up enables the operative movement of the servo-motor to act on a comparator in the control circuit between the output of the controller and the input of the servo-motor. The output of the comparator is also connected to attenuating means which are operative in the entry path of the I-member. The attenuating means includes a functions pick-off and a multiplier element. The functions pick-off delivers an output signal which is lower for a high absolute value of its input signal than for a low absolute value. This output signal acts via the multiplier element on the entry path of the I-member.