Control unit having a signal converter

1. A control unit for a transportation device having a processing unit that is supplied with power by a first supply voltage and has a signal converter for converting analog signals to digital signals; the signal converter having an analog converter stage for generating a modified signal from an analog signal which is present at the signal converter input, and a digital converter stage for generating a digital signal from the modified signal; the analog converter stage having a signal integration unit whose output signals are fed to a signal amplitude comparator; and the digital converter stage having a scanning device to whose output the analog-to-digital-converted digital signal is applied; wherein,

the digital converter stage comprises configurable logic circuits provided on a chip of the processing unit;

the analog converter stage comprises components outside the processing unit; and

the analog converter stage is supplied with voltage by a second supply voltage having a voltage that differs from the first supply voltage.

2. The control unit according to claim 1 , wherein the analog converter stage has a signal adder at its input, which signal adder adds the analog signal and a feedback signal from the digital converter stage.

3. The control unit according to claim 1 , wherein the feedback signal is fed back from an output of the scanning device and is digital-to-analog-converted.

4. The control unit according to claim 1 , wherein the digital converter stage has a digital filter that processes digital signals at an output of the scanning stage.

5. The control unit according to claim 1 , wherein:

the first supply voltage for the processing unit is a voltage of less than 5 V; and

the second supply voltage is greater than the first supply voltage.

6. The control unit according to claim 1 , wherein:

a part of the signal converter is wired as a timed storage element whose clock rate has a higher frequency than a processing clock rate of the processing unit; and

the timed storage element is provided as the scanning device of the signal converter.

7. The control unit according to claim 1 , wherein the processing unit has a programmable or configurable interface area in which digital filters, a sequence control of the signal converter or counters are implemented on the chip.

8. A data processing device comprising:

first and second voltage supplies providing first and second voltages that differ from each other;

a signal converter for converting analog input signals to digital signals, said signal converter including an analog converter stage for generating modified signals in response to said input signals, and a digital converter stage for generating digital signals in response to the modified signals; wherein,

the analog converter stage has a signal integration unit whose output signals are fed to a signal amplitude comparator;

the digital converter stage has a scanning device to whose output the analog-to-digital converted signal is applied;

the digital stage comprises configurable logic circuits on a chip of the processing device;

the analog converter stage comprises components outside the processing device;

the first voltage supply provides power to the processing device; and

the second voltage supply provides power to the analog converter stage.