Noise rejection
AssigneeAzoteq (Pty) Ltd
InventorsFrederick Johannes Bruwer, Jean Viljoen, Grant Cecil Harker, Douw Gerbrandt van Merwe
Life of this patent
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Abstract
A capacitive sensing circuit including a microchip and a sense plate, wherein the microchip comprises a hardware Q RF noise detector module that provides a logical indication of when noise impacts on the integrated circuit.
Claims9
1-9. (canceled)
A capacitive sensing circuit which includes a sense plate, a microchip connected to the sense plate, and a measurement circuit, wherein charge reflecting capacitance associated with the sense plate is transferred to the measurement circuit, and wherein the microchip effectively reduces the capacitance associated with the sense plate by reducing the amount of charge transferred to the measurement circuit, and wherein the size of the reduction in the amount of charge is determined before a capacitive measurement.
Dependencies are inferred from the claim text.