Calibration of a dual-path pulse width modulation system

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United States of America Patent

PATENT NO 10181845
SERIAL NO

15927691

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Abstract

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A system may include a digital pulse width modulator subsystem, a first path coupled to an output of the digital pulse width modulator subsystem and configured to drive an open-loop driver stage, a second path coupled to the output of the digital pulse width modulator subsystem and configured to drive a closed-loop analog pulse width modulator, a controller to select between the first path and the second path for processing a signal based on one or more characteristics of the signal, and a calibration subsystem configured to calibrate at least one of a first gain of the first path and a second gain of the second path in order that the first gain and the second gain are at least approximately equal at the time of switching selection between the first path and the second path or vice versa, in order to minimize artifacts due to the switching.

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Patent Owner(s)

Patent OwnerAddress
CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTDEDINBURGH EDINBURGH EDINBURGH

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Das, Tejasvi Austin, US 104 1255
Fei, Xiaofan Austin, US 69 476
Gaboriau, Johann G Austin, US 30 240
Melanson, John L Austin, US 500 10993
Morton, Alan Mark Austin, US 9 124
Vellanki, Amar Cedar Park, US 22 33
Zhao, Xin Austin, US 1071 7724
Zhu, Lei Austin, US 374 2364

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