Qualcomm Incorporated

Maxim Integrated Products, Inc.

Guang Zhang

Bo Sun

Brett Christopher Walker

David J Maldonado

Puay Hoe See

Yayue Zhang

Rudy Kurniawan

Guoying Yi

Chin Boon Huam

Jia Hu

Sungil Ha

Haitao Hu

John Hu

A battery charging system includes a master charger that receives a supply voltage, outputs a master charging current based on the supply voltage, and selectively outputs a slave charger control signal. At least one slave charger receives the slave charger control signal from the master charger, receives the supply voltage, and selectively outputs a slave charging current based on the slave charger control signal and the supply voltage.

Master slave charging architecture with communication between chargers

A method for controlling the voltage of signals used to control power amplifiers is described. A first multiplexer and a second multiplexer are set to an enabling signal. The first multiplexer is on a first integrated circuit and the second multiplexer is on a second integrated circuit. A command is written to the first multiplexer to set the first multiplexer to one of a plurality of control signals used to control a power amplifier. A command is written to the second multiplexer to select one of the plurality of control signals that maps to the first multiplexer. The second integrated circuit is connected to a power supply.

Systems and methods for controlling the voltage of signals used to control power amplifiers

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San Diego, CA, United States of America

Guang Zhang