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US 2025/0164334 A1Published application
Parasitic Insensitive Sampling in Sensors
AssigneeMurata Manufacturing Co., Ltd.
InventorsVishnu Srinivasan, Ion Opris, Keith Bargroff
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Abstract
Methods and devices to mitigate time varying impairments in sensors are described. The application of such methods and devices to pressure sensors facing time varying parasitic capacitances due to water droplets is detailed. Benefits of auto-zeroing technique as adopted in disclosed devices is also described.
Claims21
(canceled)
A sensor system, comprising:
- a sensor comprising a sense capacitor;
- a readout integrated circuit comprising an analog-to-digital converter having an ADC input coupled to the sense capacitor;
- an offset capacitance coupled to the ADC input;
- wherein the offset capacitance is configured to charge or discharge out of phase with respect to the sense capacitor.
1 more element
A method of operating a sensor system, comprising:
- providing a sense capacitor;
- providing a readout integrated circuit comprising an analog-to-digital converter having an ADC input coupled to the sense capacitor;
- coupling an offset capacitance to the ADC input;
- and
- charging or discharging the offset capacitance out of phase with respect to the sense capacitor.
2 more elements
Dependencies are inferred from the claim text.