Invention Publication
- Patent Title: CIRCUITRY FOR DRIVING A LOAD
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Application No.: US18280859Application Date: 2022-03-14
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Publication No.: US20240168506A1Publication Date: 2024-05-23
- Inventor: Tejasvi DAS , Siddharth MARU , Cory J. PETERSON , John L. MELANSON
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: GB Edinburgh
- Assignee: Cirrus Logic International Semiconductor Ltd.
- Current Assignee: Cirrus Logic International Semiconductor Ltd.
- Current Assignee Address: GB Edinburgh
- International Application: PCT/GB2022/050648 2022.03.14
- Date entered country: 2023-09-07
- Main IPC: G05F1/56
- IPC: G05F1/56 ; G01R19/00 ; G01R27/16

Abstract:
The present disclosure relates to circuitry for driving a load. The circuitry comprises: primary driver circuitry coupled to a primary signal path and operable to drive the load with a playback signal in a first mode of operation of the circuitry, wherein a playback signal comprises a signal that drives the load to generate a desired output; auxiliary driver circuitry coupled to an auxiliary signal path; an auxiliary current sense resistor in the auxiliary signal path; and current detection circuitry coupled to the auxiliary current sense resistor and configured to generate a signal indicative of a current through the load. One of the primary driver circuitry and the auxiliary driver circuitry is operable to drive the load with a pilot signal in a second mode of operation of the circuitry, wherein a pilot signal comprises a signal having a predefined frequency or frequency content and a predefined magnitude.
Information query
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