Patent ID: 9658295
Date: 2017-05-23
CPC Classifications: G01D,G01P,G01R

Claim:
1. A device for removing an offset from a signal outputted by a sensor, the device comprising an output port of a comparator unit; a frequency estimation unit configured to estimate a frequency of the signal; an offset estimation unit configured to estimate the offset in the signal by applying an adaptive low pass filter to the signal, wherein a cut-off frequency of the adaptive low pass filter is determined based on the frequency of the signal estimated by the frequency estimation unit, wherein an input to the frequency estimation unit is coupled to the output port and an output of the frequency estimation unit is inputted to the adaptive low pass filter; and a subtraction unit adapted to subtract the offset estimated by the offset estimation unit from the signal wherein an input to the adaptive low pass filter is coupled to a first input to the subtraction unit and an output of the adaptive low pass filter is inputted to a second input to the subtraction unit and an output of the subtraction unit is coupled to the output port.