DK2845314T3 - CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES - Google Patents

CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES Download PDF

Info

Publication number
DK2845314T3
DK2845314T3 DK13720310.5T DK13720310T DK2845314T3 DK 2845314 T3 DK2845314 T3 DK 2845314T3 DK 13720310 T DK13720310 T DK 13720310T DK 2845314 T3 DK2845314 T3 DK 2845314T3
Authority
DK
Denmark
Prior art keywords
signal
class
output
pulse width
level
Prior art date
Application number
DK13720310.5T
Other languages
Danish (da)
English (en)
Inventor
Mikkel Høyerby
Original Assignee
Merus Audio Aps
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merus Audio Aps filed Critical Merus Audio Aps
Application granted granted Critical
Publication of DK2845314T3 publication Critical patent/DK2845314T3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/4837—Flying capacitor converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/351—Pulse width modulation being used in an amplifying circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
DK13720310.5T 2012-04-30 2013-04-24 CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES DK2845314T3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261640565P 2012-04-30 2012-04-30
PCT/EP2013/058450 WO2013164229A1 (en) 2012-04-30 2013-04-24 Class d audio amplifier with adjustable loop filter characteristics

Publications (1)

Publication Number Publication Date
DK2845314T3 true DK2845314T3 (en) 2016-10-03

Family

ID=48289098

Family Applications (1)

Application Number Title Priority Date Filing Date
DK13720310.5T DK2845314T3 (en) 2012-04-30 2013-04-24 CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES

Country Status (7)

Country Link
US (1) US9564862B2 (enExample)
EP (1) EP2845314B1 (enExample)
JP (1) JP6325526B2 (enExample)
KR (1) KR102068105B1 (enExample)
CN (1) CN104272589B (enExample)
DK (1) DK2845314T3 (enExample)
WO (1) WO2013164229A1 (enExample)

Families Citing this family (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8401212B2 (en) 2007-10-12 2013-03-19 Earlens Corporation Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management
BRPI0915203A2 (pt) 2008-06-17 2016-02-16 Earlens Corp dispostivo, sistema e método para transmitir um sinal de áudio, e, dispostivo e método para estimular um tecido alvo
CN102301747B (zh) 2008-09-22 2016-09-07 依耳乐恩斯公司 用于听觉的平衡电枢装置和方法
WO2012088187A2 (en) 2010-12-20 2012-06-28 SoundBeam LLC Anatomically customized ear canal hearing apparatus
US9653986B2 (en) 2013-03-15 2017-05-16 Maxim Integrated Products, Inc. Multi-level step-up converter topologies, control and soft start systems and methods
GB2557050B (en) 2013-10-23 2018-08-22 Cirrus Logic Int Semiconductor Ltd Class-D Amplifier circuits
US20150222230A1 (en) * 2014-02-03 2015-08-06 Auriga Measurement Systems, LLC Output power tuning using pulse position and pulse width control in a pulse position, pulse width modulation amplifier
US10034103B2 (en) 2014-03-18 2018-07-24 Earlens Corporation High fidelity and reduced feedback contact hearing apparatus and methods
US9866188B2 (en) * 2014-04-02 2018-01-09 Nanyang Technological University Dead time circuit for a switching circuit and a switching amplifier
WO2016011044A1 (en) 2014-07-14 2016-01-21 Earlens Corporation Sliding bias and peak limiting for optical hearing devices
JP6510199B2 (ja) * 2014-08-19 2019-05-08 ローム株式会社 スイッチング回路、オーディオアンプ集積回路、電子機器、電気音響変換素子の駆動方法
US9263992B1 (en) 2014-09-15 2016-02-16 Apple Inc. Class D amplifier with variable switching frequency
US9924276B2 (en) 2014-11-26 2018-03-20 Earlens Corporation Adjustable venting for hearing instruments
US9806682B1 (en) * 2015-02-24 2017-10-31 Marvell International Ltd. Multilevel class-D amplifiers
US20170095202A1 (en) 2015-10-02 2017-04-06 Earlens Corporation Drug delivery customized ear canal apparatus
US9602317B1 (en) * 2015-10-12 2017-03-21 Qualcomm Incorporated Apparatus and method for combining currents from passive equalizer in sense amplifier
US11350226B2 (en) 2015-12-30 2022-05-31 Earlens Corporation Charging protocol for rechargeable hearing systems
US10178483B2 (en) 2015-12-30 2019-01-08 Earlens Corporation Light based hearing systems, apparatus, and methods
DE112017000698B4 (de) * 2016-02-08 2024-03-21 Sony Corporation Sendevorrichtung und Kommunikationssystem
US10218312B2 (en) 2016-02-29 2019-02-26 Qualcomm Incorporated Dynamic volume management in audio amplifiers
US20170250654A1 (en) * 2016-02-29 2017-08-31 Qualcomm Incorporated Dynamic dead time management
US10256777B2 (en) 2016-02-29 2019-04-09 Qualcomm Incorporated Audio amplifiers
NL2016605B1 (en) 2016-04-14 2017-11-02 Axign B V Digital audio converter and amplifier controller.
CN107306117B (zh) * 2016-04-22 2020-11-27 晶豪科技股份有限公司 四元/三元调制选择电路
US11824454B2 (en) * 2016-06-21 2023-11-21 Eagle Harbor Technologies, Inc. Wafer biasing in a plasma chamber
US11004660B2 (en) 2018-11-30 2021-05-11 Eagle Harbor Technologies, Inc. Variable output impedance RF generator
US10804886B2 (en) * 2016-06-21 2020-10-13 Eagle Harbor Technologies, Inc. High voltage pre-pulsing
WO2018013183A1 (en) 2016-07-15 2018-01-18 Linear Technology Corporation Balancing charge pump circuits
CN112738700A (zh) 2016-09-09 2021-04-30 伊尔兰斯公司 智能镜系统和方法
WO2018093733A1 (en) 2016-11-15 2018-05-24 Earlens Corporation Improved impression procedure
CN108566071B (zh) 2016-12-16 2021-04-20 台达电子企业管理（上海）有限公司 模块化电源系统
US10110181B2 (en) 2016-12-30 2018-10-23 Texas Instruments Incorporated Class-D amplifier with post filter feedback loop
CN106992756A (zh) * 2017-03-03 2017-07-28 广东欧珀移动通信有限公司 D类功率放大器和音频设备
NL2018617B1 (en) * 2017-03-30 2018-10-10 Axign B V Intra ear canal hearing aid
WO2018189832A1 (ja) * 2017-04-12 2018-10-18 三菱電機株式会社 同期制御システムおよび制御装置
EP3402070B1 (en) * 2017-05-11 2020-02-12 Infineon Technologies Austria AG Class d audio amplifier with adjustable gate drive
EP3425795B1 (en) * 2017-07-03 2021-09-01 Infineon Technologies Austria AG Class d audio amplifier with overload protection circuit
US10044323B1 (en) * 2017-07-17 2018-08-07 Cirrus Logic, Inc. Reducing audio artifacts in an amplifier with configurable final output stage
GB2565293A (en) * 2017-08-07 2019-02-13 Reid Acoustic Designs Ltd An error amplifier
KR102629644B1 (ko) * 2017-11-10 2024-01-30 시러스 로직 인터내셔널 세미컨덕터 리미티드 복수의 독립된 출력 스테이지들을 가진 클래스-d 증폭기
JP7152642B2 (ja) * 2017-11-22 2022-10-13 テキサス インスツルメンツ インコーポレイテッド デューティサイクル制御を備えるｄ級アンプ
CN111448754B (zh) * 2017-12-07 2024-06-07 普立菲有限公司 放大器电路
ES2963490T3 (es) 2017-12-07 2024-03-27 Purifi Aps Un amplificador con compensador con una red de al menos tercer orden
WO2019110153A1 (en) * 2017-12-07 2019-06-13 Purifi Aps An amplifier with an at least second order filter in the control loop
US11223898B2 (en) * 2018-02-05 2022-01-11 Radio Sound, Inc. Audio system including speakers with integrated amplifier and method of detecting speakers
WO2019165317A2 (en) * 2018-02-23 2019-08-29 Qsc, Llc Audio amplifier assemblies, processes, and methods
WO2019173470A1 (en) 2018-03-07 2019-09-12 Earlens Corporation Contact hearing device and retention structure materials
WO2019199680A1 (en) 2018-04-09 2019-10-17 Earlens Corporation Dynamic filter
US10587232B2 (en) * 2018-05-17 2020-03-10 Cirrus Logic, Inc. Class D amplifiers
WO2020028082A1 (en) 2018-07-31 2020-02-06 Earlens Corporation Nearfield inductive coupling in a contact hearing system
CN109217827B (zh) * 2018-08-31 2022-07-01 南京矽力微电子技术有限公司 D类功率放大器及其补偿方法和数字信号处理装置
US10804813B2 (en) * 2018-11-14 2020-10-13 Ford Global Technologies, Llc Power inverter for reducing total harmonic distortion via duty cycle control
US12456604B2 (en) 2019-12-24 2025-10-28 Eagle Harbor Technologies, Inc. Nanosecond pulser RF isolation for plasma systems
US10763799B2 (en) * 2018-12-12 2020-09-01 Infineon Technologies Austria Ag Flying capacitor voltage control in an amplifier
US11309839B2 (en) * 2019-05-06 2022-04-19 Mediatek Inc. High signal-to-noise ratio amplifier with multiple output modes
US11496096B2 (en) 2019-05-29 2022-11-08 Maxim Integrated Products, Inc. Amplifier switching control systems and methods
TWI719811B (zh) 2020-01-21 2021-02-21 瑞昱半導體股份有限公司 負回授系統架構及其迴圈濾波器
US11451200B2 (en) 2020-02-25 2022-09-20 Mediatek Inc. Low pop-click noise class-D amplifier
US11336182B2 (en) * 2020-07-19 2022-05-17 xMEMS Labs, Inc. Driving circuit with energy recycle capability
EP3989438B1 (en) * 2020-10-20 2023-08-16 Nxp B.V. Digital signal generator for audio artefact reduction
US11463052B2 (en) 2020-11-30 2022-10-04 Stmicroelectronics S.R.L. PWM driving circuit and method
CN114430227B (zh) * 2022-02-07 2023-06-30 Oppo广东移动通信有限公司 一种纹波电压处理装置及方法和开关电源
US20230344394A1 (en) * 2022-04-21 2023-10-26 Cirrus Logic International Semiconductor Ltd. Non-linear function in an early-sampled hybrid multi-level converter amplifier system
WO2023205376A1 (en) * 2022-04-21 2023-10-26 Cirrus Logic International Semiconductor Ltd. Non-linear function in an early-sampled hybrid multi-level converter amplifier system
TWI892510B (zh) * 2024-03-13 2025-08-01 瑞昱半導體股份有限公司 音頻放大系統及其方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06303049A (ja) * 1993-04-14 1994-10-28 Mitsubishi Electric Corp Ｐｗｍ増幅器
US6819912B2 (en) 2001-11-05 2004-11-16 Freescale Semiconductor, Inc. Variable frequency switching amplifier and method therefor
US7110737B2 (en) 2002-05-14 2006-09-19 Sony Corporation Audio equipment and control method of audio equipment
JP2004072707A (ja) * 2002-06-13 2004-03-04 Sony Corp パワーアンプ装置
US7002406B2 (en) * 2003-05-16 2006-02-21 Texas Instruments Incorporated Loop filter for class D amplifiers
JP4137732B2 (ja) * 2003-07-29 2008-08-20 シャープ株式会社 ディジタルアンプの駆動方法及び音声信号再生装置
DE102006026906B4 (de) 2006-06-09 2011-02-10 Infineon Technologies Ag Schaltung und Verfahren zur Pulsweitenmodulation mittels synchronisierter, selbstoszillierender Pulsweitenmodulatoren
JP2008066995A (ja) * 2006-09-06 2008-03-21 Fujitsu Ten Ltd 乗物搭載オーディオ機器用信号増幅装置
GB0710186D0 (en) * 2007-05-29 2007-07-04 Texas Instr Denmark PWM loop with minimum allasing error property
GB0717958D0 (en) * 2007-09-14 2007-10-24 Motorola Inc Power supply controller circuitry
JP5532192B2 (ja) * 2008-01-24 2014-06-25 独立行政法人産業技術総合研究所 電力変換装置
EP2221964B1 (en) * 2009-02-18 2015-06-24 Hypex Electronics B.V. Self oscillating class D amplification device
US8189802B2 (en) 2009-03-19 2012-05-29 Qualcomm Incorporated Digital filtering in a Class D amplifier system to reduce noise fold over
US8212612B2 (en) * 2010-07-19 2012-07-03 Broadcom Corporation Closed-loop class-D amplifier with modulated reference signal and related method
US9515617B2 (en) * 2010-10-27 2016-12-06 Merus Audio Aps Audio amplifier using multi-level pulse width modulation

Also Published As

Publication number Publication date
EP2845314A1 (en) 2015-03-11
EP2845314B1 (en) 2016-06-29
CN104272589A (zh) 2015-01-07
JP2015515841A (ja) 2015-05-28
WO2013164229A1 (en) 2013-11-07
US20150288335A1 (en) 2015-10-08
KR20150016301A (ko) 2015-02-11
KR102068105B1 (ko) 2020-01-20
CN104272589B (zh) 2017-10-24
US9564862B2 (en) 2017-02-07
JP6325526B2 (ja) 2018-05-16

Similar Documents

Publication Publication Date Title
DK2845314T3 (en) CLASS-D AUDIO AMPLIFIER WITH ADJUSTABLE LOOP FILTER FEATURES
US9979354B2 (en) Audio amplifier using multi-level pulse width modulation
JP7176859B2 (ja) 調整可能なゲート駆動のｄ級オーディオ増幅器
KR102551525B1 (ko) 멀티-레벨 클래스 d 오디오 전력 증폭기들
KR100453708B1 (ko) 고효율 스위칭 증폭기