Pre-biased mode switching in system having selectable pulse-width modulated (PWM) and linear operation

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United States of America Patent

PATENT NO 11949321
APP PUB NO 20230128810A1
SERIAL NO

17510707

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Abstract

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An electronic control system provides selectable linear and pulse-width modulated (PWM) operation with reduced disruption when changing from PWM operation to linear operation. The system includes an output stage that has a push-pull driver coupled to the load, which may be a motor, a haptic device, or other device requiring current-mode control. The system also includes a pulse-width modulated (PWM) driver for providing pulse-width modulated drive signals to gates of the transistors of the output stage when a pulse-width modulated mode is selected, and a linear amplifier stage that provides a linear analog signal to the gates of the transistors when a linear mode is selected. A pre-charging circuit pre-charges the gates during a pre-charge cycle that is initiated when the operating mode changes from the PWM operating more to the linear operating mode.

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Patent Owner(s)

  • CIRRUS LOGIC INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jain, Nishant Austin, US 23 184
Parupalli, Vamsikrishna Austin, US 25 27
Wang, Mengde Austin, US 11 9

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