Sensor readout system and sensor readout method

A sensor readout method comprising:

• generating a biasing signal;
• up-modulating or down-modulating the biasing signal using a chopping signal with a chopping frequency fchop to generate a modulated biasing signal;
• receiving, by a Wheatstone bridge circuit comprising resistive branches, the modulated biasing signal, wherein at least one of the resistive branches comprises an impedance-based sensor;
• generating, by the Wheatstone bridge circuit, a sensing signal based on the modulated biasing signal;
• and
• up-modulating or down-modulating the sensing signal using the chopping signal with the chopping frequency fchop to generate a modulated sensing signal.

A system comprising:

• a first chopper configured to up-modulate or down-modulate a biasing signal generated by a signal generator using a chopping signal with a chopping frequency fchop to generate a modulated biasing signal;
• a Wheatstone bridge circuit comprising resistive branches, wherein at least one of the resistive branches comprises an impedance-based sensor, and wherein the Wheatstone bridge circuit is configured to receive the modulated biasing signal and to generate a sensing signal based on the modulated biasing signal;
• and
• a second chopper configured to up-modulate or down-modulate the sensing signal using the chopping signal with the chopping frequency fchop to generate a modulated sensing signal.