SCHALTUNGSANORDNUNG ZUM WANDELN MEHRERER AN EINGANGSANSCHLUESSEN LIEGENDER, ANALOGER ELEKTRISCHER MESSSIGNALE IN ENTSPRECHENDE DIGITALE SIGNALE

摘要

The invention concerns a circuit arrangement for converting a plurality of analog electrical measurement signals to corresponding digital signals. To obtain such a circuit with a fairly simple structure, antialiasing filters (11) on the input side are connected on the output side to at least two multiplexers (14, 20; 26, 27) associated with at least two scanning-holding circuits (15, 21; 28, 29). At least two analog-digital converters (16, 22; 30, 31) are connected on the input side to the output of a scanning-holding circuit (15, 21; 28, 29). An evaluation device (18) is arranged after the at least two analog-digital converters (16, 22; 30, 31) and determines, in an evaluation interval (O - T1), several digital values corresponding to scanning values of an electric signal (M1, M2) and averages them to produce the corresponding digital signal. The at least two multiplexers (14, 20, 26, 27) are connected to a control device (24) which controls said multiplexers so that the outputs of the antialiasing filters (11) are connected consecutively and in sequence via one multiplexer (e.g., 14) and, at the same time, consecutively and in reversed sequence via the second multiplexer (e.g., 20) to the scanning holding circuit (e.g., 15, 21).