FINGER DETECTION WITH AUTO-BASELINE TRACKING

摘要

A device and system for automatically tracking a baseline input into a biometric sensor is provided. The device and system include a processing system with an amplifier having an input terminal and an output terminal for producing an output signal based on the input signal received by the input terminal. The processing system further includes at least one signal conditioning element coupled to the input terminal of the amplifier and configured to condition a compensation signal, and the processing system further includes a control circuit that adjusts one or more signal conditioning parameters of the at least one signal conditioning element based on the output signal of the amplifier. The at least one input signal received by the input terminal includes a combination of the at least one compensation signal and a signal from a first set of one or more receiver electrodes of the biometric sensor.

主权项

1. A processing system for automatically tracking a baseline input into a biometric sensor, the processing system comprising:
an amplifier having at least one input terminal and an output terminal for producing an output signal based on at least one input signal received by the at least one input terminal; at least one signal conditioning element coupled to the at least one input terminal of the amplifier and configured to condition at least one compensation signal; and a control circuit that adjusts one or more signal conditioning parameters of the at least one signal conditioning element based on the output signal of the amplifier, wherein the at least one input signal received by the input terminal includes a combination of the at least one compensation signal and a signal from a first set of one or more receiver electrodes of the biometric sensor.