Invention Grant
- Patent Title: Cross-over distortionless pulse-width modulated (PWM)/linear motor control system
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Application No.: US17230789Application Date: 2021-04-14
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Publication No.: US11962261B2Publication Date: 2024-04-16
- Inventor: Vamsikrishna Parupalli , Mark May , Eric B. Smith , Zhong You
- 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: Mitch Harris, Atty at Law, LLC
- Agent Andrew M. Harris
- Main IPC: H02P5/46
- IPC: H02P5/46 ; G02B7/09 ; G02B27/64 ; H02P7/03 ; H02P7/29 ; H02P7/292

Abstract:
An electronic motor control system provides selectable linear and pulse-width modulated (PWM) operation without generating cross-over distortion. The system includes an output stage that has a pair of push-pull drivers each coupled to a terminal of the motor. The electronic motor control system also includes a pulse-width modulated (PWM) driver for providing pulse-width modulated drive signals to an input of the output stage when the pulse-width modulated mode is selected and a linear amplifier stage that provides a linear analog signal to the input of the output stage in linear mode, so that both drivers are operated to supply the current to the motor. In pulse-width modulated mode, a driver is selected for PWM operation, while the other driver is operated to supply a fixed voltage. A feedback control loop senses motor current and provides outputs to the pulse-width modulator and the linear amplifier stage.
Public/Granted literature
- US20220337181A1 CROSS-OVER DISTORTIONLESS PULSE-WIDTH MODULATED (PWM)/LINEAR MOTOR CONTROL SYSTEM Public/Granted day:2022-10-20
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