公开(公告)号：US20230238925A1

公开(公告)日：2023-07-27

申请号：US17648958

申请日：2022-01-26

Applicant: QUALCOMM Incorporated

Inventor： Dongyang TANG ,  Xinwang ZHANG ,  ChienChung YANG ,  Earl SCHREYER ,  Sherif GALAL

IPC: H03F3/217

CPC classification number: H03F3/217 ,  H03F2200/03

Abstract: Aspects of the present disclosure relate to apparatus and methods for dynamically adjusting the common-mode input signal of a power amplifier, such as a class-D power amplifier. One example power amplifier circuit generally includes a first amplifier having a signal input and a power input; and a common-mode adjustment circuit having a first input coupled to the power input of the first amplifier, having an output coupled to the signal input of the first amplifier, and being configured to generate a common-mode signal to apply to the signal input of the first amplifier, based on a power supply voltage on the power input of the first amplifier.

公开(公告)号：US20230253934A1

公开(公告)日：2023-08-10

申请号：US17649967

申请日：2022-02-04

Applicant: QUALCOMM Incorporated

Inventor： Subbarao Surendra CHAKKIRALA ,  Sherif GALAL ,  Earl SCHREYER

IPC: H03F3/217 ,  H03F1/02

CPC classification number: H03F3/2175 ,  H03F1/0227 ,  H03F2200/03

Abstract: A hybrid class-H/predictive class-G switching amplifier architecture and techniques for amplifying a signal (e.g., an audio signal) using such an architecture. One example method of amplification generally includes delaying an input signal to generate a delayed version of the input signal, amplifying the delayed version of the input signal with an amplifier powered by a boost converter, and selectively controlling the boost converter to operate in at least one of a predictive class-G mode or a class-H mode, based on a magnitude of the input signal.

公开(公告)号：US20230300524A1

公开(公告)日：2023-09-21

申请号：US17699902

申请日：2022-03-21

Applicant: QUALCOMM Incorporated

Inventor： Subbarao Surendra CHAKKIRALA ,  Sherif GALAL ,  Earl SCHREYER

IPC: H04R3/00 ,  H02M3/156 ,  H02M1/14

CPC classification number: H04R3/00 ,  H02M3/156 ,  H02M1/14

Abstract: Apparatus and techniques for adaptively adjusting an input current limit for a boost converter supplying power to a load, such as an amplifier. An example circuit for supplying power generally includes a boost converter having an output coupled to a load, and logic configured to adaptively adjust an input current limit for the boost converter based on an estimated output power for the boost converter and to apply the input current limit to the boost converter. One example method for supplying power generally includes converting an input voltage to an output voltage with a boost converter, to power a load for the boost converter, adaptively adjusting an input current limit for the boost converter based on an estimated output power for the boost converter, and applying the input current limit to the boost converter during the converting.

公开(公告)号：US20180337637A1

公开(公告)日：2018-11-22

申请号：US15598389

申请日：2017-05-18

Applicant: QUALCOMM INCORPORATED

Inventor： Sherif GALAL ,  Subbarao Surendra CHAKKIRALA ,  Khaled ABDELFATTAH ,  Earl SCHREYER

IPC: H03F1/02 ,  H03F3/185 ,  H03F3/217 ,  H04R3/04

CPC classification number: H03F1/0216 ,  H03F1/0233 ,  H03F3/181 ,  H03F3/185 ,  H03F3/217 ,  H03F3/2175 ,  H03F2200/03 ,  H03F2200/351 ,  H03F2200/504 ,  H03F2200/555 ,  H04R3/04

Abstract: An amplifier circuit includes an amplifier and a voltage boost circuit configured to provide a variable supply voltage to the amplifier, the variable supply voltage continuously proportional to an audio input signal, the variable supply voltage configured to follow an output of the amplifier.