Invention Grant
- Patent Title: Phase compensation for an inductive position sensor
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Application No.: US17082151Application Date: 2020-10-28
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Publication No.: US11435206B2Publication Date: 2022-09-06
- Inventor: Mathew Drouin
- Applicant: Allegro MicroSystems, LLC
- Applicant Address: US NH Manchester
- Assignee: Allegro MicroSystems, LLC
- Current Assignee: Allegro MicroSystems, LLC
- Current Assignee Address: US NH Manchester
- Agency: Daly, Crowley, Mofford & Durkee, LLP
- Main IPC: G01D5/22
- IPC: G01D5/22 ; H03L7/099 ; H03K5/00 ; G01D18/00 ; G01R33/12 ; H03L7/093

Abstract:
An interface circuit for a position sensor system including an oscillator generating an oscillation signal having a carrier frequency and a primary phase, a primary coil responsive to the oscillation signal, and a secondary coil electromagnetically coupled to the primary coil by a target and configured to generate a secondary signal having the carrier frequency and a secondary phase provides phase compensation. The interface circuit includes a sampling and conversion circuit configured to sample the secondary signal during sample periods and convert the secondary signal into a digital signal, a demodulator coupled to receive the digital signal and configured to demodulate the digital signal in order to generate a position signal indicative of a position of the target, a phase detector coupled to receive the position signal and configured to detect an alignment of the secondary phase with respect to the sample periods and generate a phase detector output signal indicative of whether the secondary phase is aligned with the sample periods, and a delay circuit responsive to the phase detector output signal and configured to apply a delay to the sampling and conversion circuit if the phase detector output signal indicates that the secondary phase is not aligned with the sample periods.
Public/Granted literature
- US20220128382A1 Phase Compensation For An Inductive Position Sensor Public/Granted day:2022-04-28
Information query
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