Patent ID: 8860440

Claim:
A method for achieving robustness to electromagnetic interference in an inertial sensor system comprising a first signal path susceptible to electromagnetic interference and a second signal path susceptible to electromagnetic interference, the method comprising: switchably coupling the first signal path of the inertial sensor system to the inputs of a differential amplifier, the differential amplifier including an inverting input and a non-inverting input; switchably coupling the second signal path of the inertial sensor system to the inputs of the differential amplifier; switching a chopping system between a high state and a low state to control electromagnetic interference in the inertial sensor system, when the chopping system is in the high state: applying a first polarity voltage to a first input of the inertial sensor system, applying a second polarity voltage to a second input of the inertial sensor system, the second polarity voltage having substantially the same magnitude and opposite polarity as the first polarity voltage, coupling the first signal path of the inertial sensor system to the inverting input of the differential amplifier; and coupling the second signal path of the inertial sensor system to the non-inverting input of the differential amplifier; and when the chopping system is in the low state, applying the second polarity voltage to the first input of the inertial sensor system, applying the first polarity voltage to the second input of the inertial sensor system, coupling the first signal path of the inertial sensor system to the non-inverting input of the differential amplifier; and coupling the second signal path of the inertial sensor system to the inverting input of the differential amplifier.