Patent ID: 11949427
Assignee: CIRRUS LOGIC INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 16:
17. A compensation circuit for compensating for an offset voltage that is present in a differential output signal output by a force sensor, the compensation circuit comprising:
voltage divider circuitry, the voltage divider circuitry configured to receive a bias voltage that is also supplied to the force sensor and to output a control voltage derived from the bias voltage, wherein a ratio of the control voltage to the bias voltage is adjustable to correspond to a ratio of a quiescent differential output voltage of the force sensor to the bias voltage;
current generator circuitry configured to receive the control voltage and to generate a compensating current based on the received control voltage; and
amplifier circuitry configured to receive the differential signal output by the force sensor and the compensating current and to output a compensated differential output signal in which the offset voltage is at least partially attenuated.