Invention Grant
- Patent Title: Slew control for variable load pulse-width modulation driver and load sensing
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Application No.: US17540648Application Date: 2021-12-02
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Publication No.: US11854738B2Publication Date: 2023-12-26
- Inventor: Chandra B. Prakash , Ramin Zanbaghi
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: GB Edinburgh
- Assignee: Cirrus Logic Inc.
- Current Assignee: Cirrus Logic Inc.
- Current Assignee Address: US TX Austin
- Agency: Jackson Walker L.L.P
- Main IPC: H01H47/00
- IPC: H01H47/00 ; H01F7/06 ; H02K33/00 ; H04R9/06

Abstract:
A system may include an electromagnetic load, a driver configured to drive the electromagnetic load with a driving signal, and a processing system communicatively coupled to the electromagnetic load and configured to, during a haptic mode of the system couple a first terminal of the electromagnetic load to a ground voltage and cause the driving signal to have a first slew rate, and during a load sensing mode of the system for sensing a current associated with the electromagnetic load, couple the first terminal to a current-sensing circuit having a sense resistor coupled between the first terminal and an electrical node driven to a common-mode voltage and cause the driving signal to have a second slew rate lower than the first slew rate.
Public/Granted literature
- US20230178279A1 SLEW CONTROL FOR VARIABLE LOAD PULSE-WIDTH MODULATION DRIVER AND LOAD SENSING Public/Granted day:2023-06-08
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