Abstract: An optical pulse generator for an electric-motor drive arrangement, especially for a motor vehicle window lifting drive with an electric motor and a flanged transmission is to be provided in a simple manner which improves the operating reliability of the drive arrangement while the overall size is reduced. To this end it is proposed, according to the invention, to arrange a code wheel (1) within the electric-motor drive arrangement on the rotor shift (4) of the electric motor or on a transmission output gear (5) within the flanged transmission. A protective encapsulation is achieved while the code wheel (1) is arranged on the rotor shaft (4) by a protective housing (3) supported on the code wheel (1). Alternatively, the code wheel is arranged on the transmission output gear (5), by a protective housing formed by transmission housing wall (201), the transmission output gear (5) itself. Sealing rings (8) arranged adjacent to the code wheel.

Abstract: In order to improve the interference suppression of an electric-motor auxiliary motor-vehicle drive, particularly in the direction of electromagnetic compatibility (EMV), a protective circuit branch (2, 3) with two Zener diodes (D1; D2) or with one varistor (V1) is provided parallel to the armature circuit branch (1) of the commutator motor (M), where, for reducing the number of external solder joints, the Zener-diodes (D1; D2) or the varistor (V1) are combined with the interference suppression capacitors (C1; C2) in common integration component (6) which has only three external terminals.