公开(公告)号：US11358845B1

公开(公告)日：2022-06-14

申请号：US16355397

申请日：2019-03-15

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Akshay Mohan ,  Jagan Vaidyanathan Rajagopalan ,  Yue Zheng ,  Deepak Pai Hosadurga

IPC: H04B1/10 ,  B66F9/08 ,  H04B1/04 ,  H01Q1/10 ,  H01Q13/20 ,  H04B3/32

Abstract: A device such as an autonomous mobile device may include an extensible mast or other structure that changes length during operation. A cable between electronics at the ends of the structure includes a data line for signals and a power line for electrical power. A deployed length of the cable is determined and used to determine the phase of an antinoise signal that is radiated using the power line. The antinoise signal destructively interferes with at least a portion of the radiated noise from the data line, reducing the overall amplitude of the radiated noise. The deployed length may also be used to adjust other parameters, such as equalizer settings for one or more of a transmitter or receiver that is connected to the data line.

公开(公告)号：US11211700B1

公开(公告)日：2021-12-28

申请号：US16298723

申请日：2019-03-11

Applicant: Amazon Technologies, Inc.

Inventor： Akshay Mohan ,  Yue Zheng ,  Deepak Pai Hosadurga ,  Jagan Vaidyanathan Rajagopalan

IPC: G05B19/04 ,  H01Q3/08 ,  H01Q1/32 ,  B25J13/00 ,  B25J9/16

Abstract: Technologies for dynamic noise cancelation using noise patterns are described. One device includes a moveable assembly having first and second degrees of freedom. A component within the base assembly radiates electromagnetic energy in a radiation pattern as a noise source when operating and an antenna, coupled to a receiver, is disposed on the support member. The processing device, using noise profile data about the radiation pattern of the noise source, determines that the component is operating and a current angle between the component and the antenna. The processing device determines a difference value between the current angle and the first angle and causes the moveable assembly to move at least one of the antenna or the base assembly according to the difference value.

公开(公告)号：US10249991B1

公开(公告)日：2019-04-02

申请号：US15638111

申请日：2017-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Akshay Mohan ,  Jagan Vaidyanathan Rajagopalan ,  Deepak Pai Hosadurga

IPC: H01R13/648 ,  H01R13/6591 ,  H01R13/6477 ,  H01R13/04 ,  H01R13/46 ,  H01R13/40 ,  H01R12/52 ,  H01R13/6461 ,  H01R24/00 ,  H05K1/02

Abstract: High-speed data connectors having a variety of different implementations to address unwanted electromagnetic radiation and interference are described. In some instances, resonant unit structures are added within the existing connector cavity that absorb and dampen unwanted electromagnetic radiation. In other instances, resonant unit structures are added to the exterior of the connector to reduce and eliminate surface currents that can occur on the solid metal shield of the connector. In these and other instances, the resonant unit structure can be formed from a stacked structure having a resonant structure arranged in close proximity to some of the connector pins to absorb unwanted radiation from those pins. The absorbed energy is transferred to ground through other components in the stack. In still other instances, various different materials are provided to replace the conventional plastic material that is used to keep the connector pins in place and in alignment. The different materials can absorb unwanted electromagnetic radiation, and can be selected to address particular frequency ranges.

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.

公开(公告)号：US09887497B1

公开(公告)日：2018-02-06

申请号：US15179522

申请日：2016-06-10

Applicant: Amazon Technologies, Inc.

Inventor： Jagan Vaidyanathan Rajagopalan ,  Akshay Mohan

IPC: H01R13/6597 ,  H01R12/70 ,  H04N21/4363

CPC classification number: H04N21/43635 ,  H01R13/6594 ,  H01R13/6599

Abstract: An apparatus includes a circuit board including a contact pad. The circuit board includes one or more chips on the circuit board. The circuit board further includes a signal pin having a first end, a second end, and an intermediate portion between the first end and the second end. The first end of the signal pin is in contact with the contact pad, where the signal pin has a resonant frequency outside a predetermined frequency range. The apparatus includes a lossy dielectric material surrounding the intermediate portion of the signal pin, where the lossy dielectric material is configured to absorb radio frequency signals from the signal pin in the predetermined frequency range.

公开(公告)号：US09819991B1

公开(公告)日：2017-11-14

申请号：US15056954

申请日：2016-02-29

Applicant: Amazon Technologies, Inc.

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

IPC: H04N7/00 ,  H04N11/00 ,  H04N21/426 ,  H04N5/21 ,  H04N21/4363

CPC classification number: H04N21/42607 ,  G09G5/006 ,  H04N5/21 ,  H04N5/44 ,  H04N21/43635

Abstract: A device is described. The device includes a data interface connector, an application processor, and interface circuitry. The application processor can receive signals via an antenna. The interface circuitry can be coupled between the application processor and the data interface connector. The data interface circuitry can determine a change in a signal property of one of the signals, the change being caused by an impedance mismatch between the data interface connector and a media consumption device. The data interface circuitry can also send the application processor a signal property setting corresponding with the change. The application processor can adjust the signal property of a subsequent one of the signals, in response to the signal property setting from the interface circuitry, to obtain an adjusted signal. The application processor can also send the adjusted signal to the media consumption device.