Schaltungsanordnung zur Ansteuerung eines in zwei Richtungen antreibbaren Gleichstrommotors

摘要

The circuit has a reference potential input and a control input, with which the motor speed can be regulated. A switching arrangement can switch the controller (8) so as to control the motor speed for a first direction of rotation and to switch it to an inactive state for the second rotation direction. The switching arrangement contains four transistors (1-4) . For the first direction a first motor connection (6a) is connected to the supply voltage via the first transistor and to the reference potential input (8a) via the second transistor and the second connection (6b) to the control input (8b). For the second direction the first connection is connected to the reference voltage via the third transistor and the second connection to the supply potential via the fourth transistor.