Cirel Systems Private Limited

Navaneeth Bhardwaj Gokul

Vikas Agarwal

Disclosed is an adaptive stylus frontend to identify and update zero force offset pressure codes. The adaptive stylus frontend comprises a high gain instrumentation amplifier configured to receive the analog signal and provide the required gain to the analog signal. The adaptive stylus frontend comprises an analog-to-digital converter configured to convert the analog signal to digital codes at a predetermined sampling frequency. The stylus comprises an adaptive offset controller configured to adaptively identify, and update zero force offset pressure codes, wherein the zero force offset pressure code is the ADC output value when no external force is applied at the stylus tip. The zero force offset pressure comprises the pressure sensor offset introduced by a pressure sensor, the amplifier offset introduced by the amplifier, and the offset introduced by the analog to digital converter.

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Bengaluru, India

Navaneeth Bhardwaj Gokul