Hall sensor-based data acquisition system

US11782101B2 · kind B2 · utility

Assignee

• CIRRUS LOGIC, INC. · US

Inventors

• Prashanth Drakshapalli · Austin, US
• John L. Melanson · Austin, US
• Anindya Bhattacharya · Austin, US
• Seung Bae Lee · Yongin-si, KR

Key dates

• Filing date: Aug 6, 2020
• Grant date: Oct 10, 2023
• Expiry date: Oct 7, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/075
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A data acquisition system (DAS) for acquiring data from a Hall effect sensor includes one or more state variables, a multiplexer that periodically rotates a signal from the Hall effect sensor, and a controller that resets the one or more state variables in synchronization with rotation of the signal. The state variables may be digital states in a digital memory or voltages of capacitors the controller forces to a reset voltage. The state variables may be included in a noise-shaping SAR ADC, a delta-sigma ADC, a digital filter, an integrator, an analog filter, a VCO, an incremental ADC or an auxiliary ADC-assisted incremental ADC, or an auxiliary ADC of the DAS.