Half-bridge circuit for a sensor

A method for compensating for common mode injection of a circuit comprising a sensor, the method comprising:

• responsive to receiving a physical signal at the sensor comprising a first sensor capacitor and a second sensor capacitor, changing capacitances of the first sensor capacitor and the second sensor capacitor, wherein the capacitances of the first sensor capacitor and the second sensor capacitor change in opposing directions;
• generating a plurality of sensor signals at the sensor according to the physical signal, a plurality of drive signals, and the capacitances of the first sensor capacitor and the second sensor capacitor, the plurality of sensor signals comprising a common mode injection and a plurality of differential signals;
• and
• compensating for the common mode injection of the plurality of sensor signals using a half-bridge circuit coupled to the sensor, the half-bridge circuit comprising a first half-bridge capacitor and a second half-bridge capacitor, wherein capacitances of the first half-bridge capacitor and the second half-bridge capacitor compensate for the common mode injection of the plurality of sensor signals, the compensating comprising:
• determining, at a half-bridge trimming circuit, a difference between a sum of the capacitances of the first half-bridge capacitor and the second half-bridge capacitor and a sum of the capacitances of the first sensor capacitor and the second sensor capacitor.