Electrical control device for generating at least one motor control signal for an electric motor, comprising: - a delta sigma modulator configured to generate a binary data stream in response to the motor control signal, - a signal splitter circuit having a first output and a second output, wherein the binary data stream and a selection signal are applied to the signal splitter circuit, and wherein the signal splitter circuit is configured to - output the binary data stream in response to the selection signal either at the first output or at the second output as the selected output, and - output a binary test signal at the not selected output, - a filter unit, comprising - a first digital filter configured to generate a first filtered signal from a signal output at the first output of the signal splitter circuit, - a second digital filter configured to generate a second filtered signal from a signal output at the second output of the signal splitter circuit, and - a summation circuit configured to generate a sum signal in response to the first filtered signal and the second filtered signal, - an evaluation circuit to which the sum signal is applied and which is configured to obtain a measured parameter corresponding to the motor control signal in response to the sum signal, and - a monitoring device to which the first filtered signal and the second filtered signal are applied and which is configured to - generate the selection signal, and - monitor the function of the filter unit in that the filtered signal generated from the binary test signal is compared to a reference signal. - a delta sigma modulator configured to generate a binary data stream in response to the motor control signal, - a signal splitter circuit having a first output and a second output, wherein the binary data stream and a selection signal are applied to the signal splitter circuit, and wherein the signal splitter circuit is configured to - output the binary data stream in response to the selection signal either at the first output or at the second output as the selected output, and - output a binary test signal at the not selected output, - output the binary data stream in response to the selection signal either at the first output or at the second output as the selected output, and - output a binary test signal at the not selected output, - a filter unit, comprising - a first digital filter configured to generate a first filtered signal from a signal output at the first output of the signal splitter circuit, - a second digital filter configured to generate a second filtered signal from a signal output at the second output of the signal splitter circuit, and - a summation circuit configured to generate a sum signal in response to the first filtered signal and the second filtered signal, - a first digital filter configured to generate a first filtered signal from a signal output at the first output of the signal splitter circuit, - a second digital filter configured to generate a second filtered signal from a signal output at the second output of the signal splitter circuit, and - a summation circuit configured to generate a sum signal in response to the first filtered signal and the second filtered signal, - an evaluation circuit to which the sum signal is applied and which is configured to obtain a measured parameter corresponding to the motor control signal in response to the sum signal, and - a monitoring device to which the first filtered signal and the second filtered signal are applied and which is configured to - generate the selection signal, and - monitor the function of the filter unit in that the filtered signal generated from the binary test signal is compared to a reference signal. - generate the selection signal, and - monitor the function of the filter unit in that the filtered signal generated from the binary test signal is compared to a reference signal.