公开(公告)号：US10778345B2

公开(公告)日：2020-09-15

申请号：US15862279

申请日：2018-01-04

Applicant: Apple Inc.

Inventor： Wassim El-Hassan ,  Mohammad Reza Ghajar ,  Gurusubrahmaniyan Subrahmaniyan Radhakrishnan ,  Vineet Nayak ,  Srinivasa Yasasvy Sateesh Bhamidipati

IPC: H04B17/13 ,  H03F3/24 ,  H03F1/02 ,  H04B1/04 ,  H03F1/32 ,  H04L5/00

Abstract: The representative embodiments discussed in the present disclosure relate to techniques in which the operating characteristics (e.g., gain and/or efficiency) of a power amplifier in a transmitter may be regulated according to an operation mode of the transmitter. More specifically, in some embodiments, different look-up tables (LUTs) may be employed for each mode of operation to suitably adjust the supply voltage to the power amplifier and modulate its operating characteristics based on power input to the power amplifier. Further, in some embodiments, a method to calibrate a LUT for uplink carrier aggregation (ULCA) operation mode of the transmitter may be employed to populate a LUT used to suitably adjust the supply voltage during ULCA.

公开(公告)号：US20190081712A1

公开(公告)日：2019-03-14

申请号：US15862279

申请日：2018-01-04

Applicant: Apple Inc.

Inventor： Wassim El-Hassan ,  Mohammad Reza Ghajar ,  Gurusubrahmaniyan Subrahmaniyan Radhakrishnan ,  Vineet Nayak ,  Srinivasa Yasasvy Sateesh Bhamidipati

IPC: H04B17/13 ,  H03F3/24

Abstract: The representative embodiments discussed in the present disclosure relate to techniques in which the operating characteristics (e.g., gain and/or efficiency) of a power amplifier in a transmitter may be regulated according to an operation mode of the transmitter. More specifically, in some embodiments, different LUTs may be employed for each mode of operation to suitably adjust the supply voltage to the power amplifier and modulate its operating characteristics based on power input to the power amplifier. Further, in some embodiments, a method to calibrate a LUT for ULCA, an operation mode of the transmitter, may be employed to populate a LUT that may be used to suitably adjust the supply voltage during ULCA.

公开(公告)号：US20170222673A1

公开(公告)日：2017-08-03

申请号：US15012347

申请日：2016-02-01

Applicant: Apple Inc.

Inventor： Mohammad Reza Ghajar ,  Huanyu Chen ,  Robert S. Sorensen

IPC: H04B1/10 ,  H04B1/18

CPC classification number: H04B1/1036 ,  H04B1/123 ,  H04B1/18 ,  H04B2001/1063

Abstract: An electronic device includes an antenna configured to receive a wireless transmission. The wireless transmission includes noise and data to be received. The electronic device includes a signal splitter that splits the wireless transmission into a first signal and a second signal. The electronic device includes a filter configured to filter the data to be received in the first signal. Furthermore, the electronic device includes merging circuitry configured to subtract the first signal from the second signal to reduce the noise in the second signal.

公开(公告)号：US10135476B2

公开(公告)日：2018-11-20

申请号：US15012347

申请日：2016-02-01

Applicant: Apple Inc.

Inventor： Mohammad Reza Ghajar ,  Huanyu Chen ,  Robert S. Sorensen

IPC: H04B1/10 ,  H04B1/18

Abstract: An electronic device includes an antenna configured to receive a wireless transmission. The wireless transmission includes noise and data to be received. The electronic device includes a signal splitter that splits the wireless transmission into a first signal and a second signal. The electronic device includes a filter configured to filter the data to be received in the first signal. Furthermore, the electronic device includes merging circuitry configured to subtract the first signal from the second signal to reduce the noise in the second signal.