Signal processing device and control device

A signal processor (1-1, 1-2, 1-3) for processing a differential signal (3-1, 3-2) of a sensor (2-1, 2-2) at a prescribed signal frequency (4), the signal processor (1-1, 1-2, 1-3) comprising:

• a positive signal input (5-1, 5-2, 5-3), coupled to a positive sensor output (9-1, 9-2) of the sensor (2-1, 2-2),
• a negative signal input (6-1, 6-2, 6-3), coupled to a negative sensor output (10-1, 10-2) of the sensor (2-1, 2-2),
• a positive signal output (7-1, 7-2, 7-3),
• a negative signal output (8-1, 8-2, 8-3),
• a first frequency-dependent resistance (C1H) between the positive signal input (5-1, 5-2, 5-3) and the positive signal output (7-1, 7-2, 7-3),
• a second frequency-dependent resistance (C1L) between the negative signal input (6-1, 6-2, 6-3) and the negative signal output (8-1, 8-2, 8-3),
• a voltage supply connection (VDD) and a ground connection (GND);
• wherein the first and the second frequency-dependent resistance (C1H, C1L) are configured to allow electrical signals at the prescribed signal frequency (4) to pass in unattenuated fashion,
• a first voltage divider (11), one or more components of the first voltage divider connected in parallel with the first frequency-dependent resistance (C1H) and configured to divide a voltage between the positive signal input (5-1, 5-2, 5-3) and the positive signal output (7-1, 7-2, 7-3) using a predetermined ratio,
• a second voltage divider (12), one or more components of the second voltage divider connected in parallel with the second frequency-dependent resistance (C1L) and configured to divide a voltage between the negative signal input (6-1, 6-2, 6-3) and the negative signal output (8-1, 8-2, 8-3) using a predetermined ratio, and
• a resistance network, disposed between the first voltage divider (11) and the second voltage divider (12) and the voltage supply connection (VDD) and the ground connection (GND), the resistance network configured to adjust a DC voltage at the positive signal output (7-1, 7-2, 7-3) and the negative signal output (8-1, 8-2, 8-3) to a prescribed value.