The invention relates to a method for
voltage encoding of switching states of a switching unit (12) which has at least three switching elements (14), wherein a circuit arrangement (10) has an input connection (22) for each of the switching elements (14), wherein the circuit arrangement (10) has a reduced number of output connections (28, 30) corresponding to the number of switching elements (14), and wherein the circuit arrangement (10) individually assigns exactly one combination of
voltage levels at the output connections (28, 30) to each switched-on switching state of each switching element (14).According to the invention, each input terminal (22, 24, 26) is electrically coupled to each output terminal (28, 30) by means of a
resistor network (32), wherein the
resistor network (32) has a series connection of at least two measuring resistors (R4, R5, R8, R9) for each output terminal (28, 30), wherein a first series connection terminal (38, 42) is electrically coupled to exactly one respective output terminal (28, 30), and wherein second series connection terminals (40, 44) are electrically coupled to each other via a
coupling resistor (R3, R7).