Device for forming digital/analog-converted adjustment signals

摘要

The invention relates to the multiplex driving of axle drives in position control loops allocated to axles. In this arrangement, a single D/A converter preceded by a memory device and followed by axle-associated hold element amplifiers is provided. The purpose of the invention is to improve the dynamic range of the control and the steadiness of movement in the respective position control loop and to make it independent of speed ranges. The object is achieved to keep the magnitude of the step of the digital/analog-converted value unchanged over the entire speed range of the inputs of the axle drives. The essence of the invention consists in a further hold element amplifier, operating in a multiplex manner, inserted between the D/A converter and the axle-associated hold element amplifiers, in a division of the memory device into a more significant and a less significant component of the adjustment signal, and in a control circuit by means of which the adjustment signal is successively converted with reduced resolution in its components, one part is temporarily stored as analog value and assembled again in accordance with its real weighting in the analog domain.