A DC motor (20) for driving an exhaust recirculation valve of an exhaust recirculation system is controlled by analog circuits (110, 120, 130) to simplify circuitry and assure temperature compensation. A force weaker than the force of a return spring of the exhaust recirculation valve and acting to open the valve is constantly applied to the motor shaft to maintain the motor shaft and the valve shaft in contact with each other. A negative hysteresis circuit is composed of one or more Zener diodes (117) or one or more diodes (118a, 118b) or by a combination with a resistor (119).
