公开(公告)号：US09892691B1

公开(公告)日：2018-02-13

申请号：US15196722

申请日：2016-06-29

Applicant: Amazon Technologies, Inc.

Inventor： James Robert Lim ,  Bryan Holmdahl ,  Mudit Sunilkumar Khasgiwala ,  Chang Hwa Rob Yang ,  Vidhyananth Ramasamy Venkatasamy

IPC: G09G3/34 ,  G06F1/32 ,  G06F3/0483

CPC classification number: G09G3/3406 ,  G06F1/3212 ,  G06F1/325 ,  G06F1/3265 ,  G06F1/3293 ,  G06F3/0483 ,  G06F3/147 ,  G09G5/10 ,  G09G2320/0626 ,  G09G2330/021 ,  G09G2370/16 ,  G09G2380/14

Abstract: Systems and methods are provided for optimizing battery life in an electronic device. The device is configured to make periodic assessments of battery capacity by measuring the DC resistance value of the battery cell. The temperature of the battery cell and/or other characteristics of the device are used to determine a threshold DC resistance level. If the measured DC resistance value reaches a determined threshold level, the device can initiate a power-saving mode in which an operating parameter of the device is adjusted to decrease power consumption.

公开(公告)号：US09628199B1

公开(公告)日：2017-04-18

申请号：US15004199

申请日：2016-01-22

Applicant: Amazon Technologies, Inc.

Inventor： Mudit Sunilkumar Khasgiwala ,  Akshay Mohan ,  Jagan Vaidyanathan Rajagopalan ,  Duck Ho Bae

IPC: H04B1/10 ,  H04B15/00 ,  H04B15/02 ,  H04B1/00 ,  H04B1/401

CPC classification number: H04B15/02

Abstract: A processing device detects an occurrence of the first set of use conditions associated with a power supply line coupled between a power source and a power sink in a user device. The processing device sets a tunable decoupling capacitor on the power supply line to a first capacitance value to reduce a level of electromagnetic interference on the power supply line at a first frequency corresponding to the first capacitance value. When the processing device detects a change from the first set of use conditions associated with the power supply line to a second set of use conditions, the processing device sets the tunable decoupling capacitor to a second capacitance value to reduce a level of electromagnetic interference on the power supply line at a second frequency corresponding to the second capacitance value.