Resonant phase sensing of resistive-inductive-capacitive sensors

US10908200B2 · kind B2 · utility

Assignee

• CIRRUS LOGIC, INC. · US

Inventors

• Zhong You · Felton, GB
• Siddharth Maru · Austin, US
• Tejasvi Das · Austin, US
• Luke Lapointe · Austin, US
• Eric J. King · Dripping Springs, US
• Anthony S. Doy · Los Gatos, US
• Srdjan Marjianovic · Austin, US
• Drew Kinney · Austin, US
• Matthew BEARDSWORTH · Austin, US
• Emmanuel Marchais · Dripping Springs, US

Key dates

• Filing date: Feb 4, 2019
• Grant date: Feb 2, 2021
• Expiry date: Feb 9, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/64
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency, and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor, wherein the displacement of the mechanical member causes a change in an impedance of the resistive-inductive-capacitive sensor.