公开(公告)号：US20230283316A1

公开(公告)日：2023-09-07

申请号：US17945520

申请日：2022-09-15

Applicant: Apple Inc.

Inventor： Muhammad Adnan ,  Xiang Guan

IPC: H04B1/40 ,  H03F3/19

CPC classification number: H04B1/40 ,  H03F3/19 ,  H03F2200/451

Abstract: Amplification circuitry is disclosed that couples neutralization transistors to amplification transistors to neutralize parasitic capacitance of the amplification transistors. Gates of a first amplification transistor and a first neutralization transistor are coupled together, and gates of a second amplification transistor and a second neutralization transistor are also coupled together. Drains of the first amplification transistor and the second neutralization transistor are coupled together, and drains of the second amplification transistor and the first neutralization transistor are also coupled together. Sources of neutralization transistors are coupled together at a node, such that a voltage swing of a first signal in the first neutralization transistor may be canceled by a voltage swing of a second signal in the second neutralization transistor. The node also couples to a resistor that prevents charge building in the neutralization transistors.

公开(公告)号：US20230254001A1

公开(公告)日：2023-08-10

申请号：US17667187

申请日：2022-02-08

Applicant: Apple Inc.

Inventor： Saikat Sarkar ,  Xiang Guan

IPC: H04B1/18 ,  H04B1/16

CPC classification number: H04B1/18 ,  H04B1/1607 ,  H04B1/1638

Abstract: This disclosure is directed to power gain variation compensation of Radio Frequency (RF) receivers based on temperature variations. An RF receiver may include amplification circuitry having a chain of multiple amplifiers and/or passive elements. Multiple distributed and/or lumped attenuators disposed at different points between amplifiers and/or passive elements of the chain may attenuate a received RF signal to compensate for gain variations of the multiple amplifiers and/or passive elements caused by a temperature change. Accordingly, the distributed and/or lumped attenuators may improve linear response of the amplifiers and/or passive elements and signal-to-noise and distortion ratio of RF signals received at the receiver.

公开(公告)号：US20230110967A1

公开(公告)日：2023-04-13

申请号：US16978559

申请日：2019-09-06

Applicant: Apple Inc.

Inventor： Haitong Sun ,  Wei Zeng ,  Dawei Zhang ,  Yuchul Kim ,  Hong He ,  Yuqin Chen ,  Yushu Zhang ,  Sohrab Emami-Neyestanak ,  Michael Gordon ,  Mark G Forbes ,  Xiang Guan ,  Yakun Sun

IPC: H04W16/28 ,  H04W8/22

Abstract: Apparatuses, systems, and methods for a wireless device and a cellular base station to support common analog beam steering for band groups. The wireless device may provide an indication of analog beam steering capability of the wireless device to the cellular base station. For example, the wireless device may support a limited number of analog beams for each of one or more band groups. The cellular base station may select beam configuration information for the wireless device based at least in part on the indication of analog beam steering capability of the wireless device. This may include selecting a common beam for multiple component carriers for the wireless device based on the wireless device’s analog beam steering capability. The cellular base station may provide the beam configuration information to the wireless device.