Patent ID: 8981834
Filing Date: 2015-03-17
Classification: G01D,G01P,G05F

Abstract:
1. An offset-compensation circuit, comprising: a control unit configured to control a compensation structure, to read an output signal during operation of a MEMS sensor, to obtain offset information about an offset present on the output signal, and to control the compensation structure as a function of the offset information; a low-pass filtering module coupled to the control unit and configured to generate a filtered output signal as a function of said output signal, the control unit is configured to obtain said offset information as a function of the filtered output signal, low-pass filtering module has a cutoff frequency; and a threshold-detector module, coupled to said low-pass filtering module, configured to receive said filtered output signal, and configured to perform a comparison between a value of said filtered output signal and at least one first threshold, and configured to generate a comparison signal, indicative of a result of the comparison, said control unit is configured to generate a control signal to control said compensation structure, as a function of said comparison signal, and the control unit is configured to modify a value of said cutoff frequency as a function of said comparison signal.