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

Claim 0:
1. A compensation circuit for compensating for an offset voltage that is present in an 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 component mismatch ratio of the voltage divider circuitry is adjustable to correspond to a component mismatch ratio of the force sensor;
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 a signal output by the force sensor and the compensating current and to output a compensated output signal in which the offset voltage is at least partially cancelled.