Method for offset compensation for sensor signals, offset compensation device and sensor device

Abstract

An offset compensation device, a sensor device and a method for offset compensation for sensor signals are described. The offset compensation device comprises a shift register containing elements in a number, an averaging unit and a low-pass filter. The method involves storing sensor values in the shift register, calculating a difference between the first element of the shift register and the last element of the shift register, determining multiple mean values, determining the lowest signal level using the low-pass filter, determining the offset by calculating the difference between the lowest signal level and a reference current value, and correcting the sensor values using the determined offset. Determining the mean values comprises starting averaging when the difference between the first element of the shift register and the last element of the shift register is greater than a threshold value, and stopping when the difference is less than the threshold value.

Dependencies are inferred from the claim text.