公开(公告)号：US12107552B2

公开(公告)日：2024-10-01

申请号：US17448244

申请日：2021-09-21

Applicant: QUALCOMM Incorporated

Inventor： Earl Schreyer ,  Sherif Galal ,  Sang-Uk Ryu ,  Hui-ya Liao Nelson ,  Subbarao Surendra Chakkirala ,  Shreyas Srikanth Payal

IPC: G06K7/10 ,  H03F1/02 ,  H03F3/24

CPC classification number: H03F1/0227 ,  H03F3/245 ,  H03F2200/03 ,  H03F2200/462 ,  H03F2200/468

Abstract: A method includes receiving first data associated with a first power amplifier and second data associated with a second power amplifier. The method also includes generating a first amplitude limiting signal having gain parameters that are based on the first data and the second data. The first data includes at least one of a temperature measurement associated with the first power amplifier, a supply voltage measurement associated with the first power amplifier, a load resistance associated with the first power amplifier, or a gain associated with the first power amplifier. The method further includes modifying an audio signal based at least in part on the first amplitude limiting signal to generate a first gain-adjusted audio signal. The method also includes providing a first output audio signal to the first power amplifier for amplification. The first output audio signal is based at least in part on the first gain-adjusted audio signal.

公开(公告)号：US11876493B2

公开(公告)日：2024-01-16

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：US11689102B2

公开(公告)日：2023-06-27

申请号：US17145831

申请日：2021-01-11

Applicant: QUALCOMM Incorporated

Inventor： Subbarao Surendra Chakkirala

IPC: H02M3/158 ,  H02M1/00 ,  H02M3/157 ,  H04R3/00

CPC classification number: H02M3/158 ,  H02M1/00 ,  H02M3/157 ,  H02M1/0016 ,  H04R3/00

Abstract: An example power supply circuit includes a boost converter and a feedback control circuit. The boost converter generally includes an inductive element coupled between an input voltage node and a switching node, a first switch coupled between the switching node and a reference potential node, a second switch or a diode coupled between the switching node and an output voltage node. The feedback control circuit has a first input coupled to the output voltage node and has an output coupled to at least a control input of the first switch. The feedback control circuit generally includes a voltage node configured to influence a duty cycle of the boost converter; and a feedforward path coupled to the voltage node and configured to have a voltage signal derived from at least one of an input voltage at the input voltage node or an output signal at the output voltage node.