Device with a Signal Amplifier Integrated Into a Semiconductor Chip

A device with a signal amplifier integrated into a semiconductor chip, which amplifier has an amplifier input for an input signal and an amplifier output for an output signal, whereby the signal amplifier, has at least two amplifier levels connected in series between the amplifier input and the amplifier output, and a feedback network arranged between the amplifier input and the amplifier output, and with a fault detection circuit integrated in the semiconductor chip to detect a faulty modulation of the output signal caused by a fault in the circuitry of the integrated circuit, whereby the fault detection circuit has a comparator which is designed to compare a comparator input signal present on the comparator input of the comparator with a predetermined tolerance value or a tolerance range, wherein a comparator input of the comparator is connected to a node of the signal amplifier arranged between two amplifier levels, and that the signal amplifier is designed such that on the node, a signal can be output that is more strongly modulated than the input signal.