DE60313570D1 - Digitalverstärker - Google Patents

Digitalverstärker

Info

Publication number
DE60313570D1
DE60313570D1 DE60313570T DE60313570T DE60313570D1 DE 60313570 D1 DE60313570 D1 DE 60313570D1 DE 60313570 T DE60313570 T DE 60313570T DE 60313570 T DE60313570 T DE 60313570T DE 60313570 D1 DE60313570 D1 DE 60313570D1
Authority
DE
Germany
Prior art keywords
digital amplifier
amplifier
digital
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE60313570T
Other languages
English (en)
Other versions
DE60313570T2 (de
Inventor
Kouji Nakajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
D&M Holdings Inc
Original Assignee
D&M Holdings Inc
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 D&M Holdings Inc filed Critical D&M Holdings Inc
Publication of DE60313570D1 publication Critical patent/DE60313570D1/de
Application granted granted Critical
Publication of DE60313570T2 publication Critical patent/DE60313570T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
    • H03G3/3021—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable by varying the duty cycle
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/341—Muting when no signals or only weak signals are present
    • 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)
DE60313570T 2003-01-06 2003-09-23 Digitalverstärker Expired - Fee Related DE60313570T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003000010A JP2004214998A (ja) 2003-01-06 2003-01-06 デジタルアンプ
JP2003000010 2003-01-06

Publications (2)

Publication Number Publication Date
DE60313570D1 true DE60313570D1 (de) 2007-06-14
DE60313570T2 DE60313570T2 (de) 2008-01-03

Family

ID=32501165

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60313570T Expired - Fee Related DE60313570T2 (de) 2003-01-06 2003-09-23 Digitalverstärker

Country Status (4)

Country Link
US (1) US6919771B2 (de)
EP (1) EP1435690B1 (de)
JP (1) JP2004214998A (de)
DE (1) DE60313570T2 (de)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10308946B4 (de) * 2003-02-28 2006-02-16 Infineon Technologies Ag Leitungstreiber
US11294618B2 (en) 2003-07-28 2022-04-05 Sonos, Inc. Media player system
US8086752B2 (en) 2006-11-22 2011-12-27 Sonos, Inc. Systems and methods for synchronizing operations among a plurality of independently clocked digital data processing devices that independently source digital data
US8290603B1 (en) 2004-06-05 2012-10-16 Sonos, Inc. User interfaces for controlling and manipulating groupings in a multi-zone media system
US11106424B2 (en) 2003-07-28 2021-08-31 Sonos, Inc. Synchronizing operations among a plurality of independently clocked digital data processing devices
US10613817B2 (en) 2003-07-28 2020-04-07 Sonos, Inc. Method and apparatus for displaying a list of tracks scheduled for playback by a synchrony group
US8234395B2 (en) 2003-07-28 2012-07-31 Sonos, Inc. System and method for synchronizing operations among a plurality of independently clocked digital data processing devices
US11650784B2 (en) 2003-07-28 2023-05-16 Sonos, Inc. Adjusting volume levels
US11106425B2 (en) 2003-07-28 2021-08-31 Sonos, Inc. Synchronizing operations among a plurality of independently clocked digital data processing devices
US9977561B2 (en) 2004-04-01 2018-05-22 Sonos, Inc. Systems, methods, apparatus, and articles of manufacture to provide guest access
US8024055B1 (en) 2004-05-15 2011-09-20 Sonos, Inc. Method and system for controlling amplifiers
US8326951B1 (en) 2004-06-05 2012-12-04 Sonos, Inc. Establishing a secure wireless network with minimum human intervention
US8868698B2 (en) 2004-06-05 2014-10-21 Sonos, Inc. Establishing a secure wireless network with minimum human intervention
JP4802765B2 (ja) * 2005-03-18 2011-10-26 ヤマハ株式会社 Ｄ級増幅器
US20060251197A1 (en) * 2005-05-03 2006-11-09 Texas Instruments Incorporated Multiple coefficient filter banks for digital audio processing
FR2892244A1 (fr) * 2005-10-18 2007-04-20 St Microelectronics Sa Circuit de detection de coherence d'une sequence pdm dans un convertisseur analogique
US7545208B2 (en) * 2005-11-12 2009-06-09 Manuel De Jesus Rodriguez Signal amplification through an electromagnetic device
JP4513022B2 (ja) * 2005-12-28 2010-07-28 ソニー株式会社 ディジタルアンプ装置及びディジタルアンプ装置のリセット方法
JP4513021B2 (ja) * 2005-12-28 2010-07-28 ソニー株式会社 ディジタルアンプ装置及びディジタルアンプ装置のミュート方法
US9202509B2 (en) 2006-09-12 2015-12-01 Sonos, Inc. Controlling and grouping in a multi-zone media system
US8483853B1 (en) 2006-09-12 2013-07-09 Sonos, Inc. Controlling and manipulating groupings in a multi-zone media system
US8788080B1 (en) 2006-09-12 2014-07-22 Sonos, Inc. Multi-channel pairing in a media system
JP5006403B2 (ja) * 2006-10-27 2012-08-22 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 無線周波数増幅器のスイッチ変調
JP2010093624A (ja) * 2008-10-09 2010-04-22 Panasonic Corp 音声出力装置
US11429343B2 (en) 2011-01-25 2022-08-30 Sonos, Inc. Stereo playback configuration and control
US11265652B2 (en) 2011-01-25 2022-03-01 Sonos, Inc. Playback device pairing
US8938312B2 (en) 2011-04-18 2015-01-20 Sonos, Inc. Smart line-in processing
US9042556B2 (en) 2011-07-19 2015-05-26 Sonos, Inc Shaping sound responsive to speaker orientation
US9729115B2 (en) 2012-04-27 2017-08-08 Sonos, Inc. Intelligently increasing the sound level of player
US9008330B2 (en) 2012-09-28 2015-04-14 Sonos, Inc. Crossover frequency adjustments for audio speakers
JP6222980B2 (ja) * 2013-05-09 2017-11-01 キヤノン株式会社 音響装置及び電子機器
US9244516B2 (en) 2013-09-30 2016-01-26 Sonos, Inc. Media playback system using standby mode in a mesh network
US9226087B2 (en) 2014-02-06 2015-12-29 Sonos, Inc. Audio output balancing during synchronized playback
US9226073B2 (en) 2014-02-06 2015-12-29 Sonos, Inc. Audio output balancing during synchronized playback
US10248376B2 (en) 2015-06-11 2019-04-02 Sonos, Inc. Multiple groupings in a playback system
US10303422B1 (en) 2016-01-05 2019-05-28 Sonos, Inc. Multiple-device setup
US10712997B2 (en) 2016-10-17 2020-07-14 Sonos, Inc. Room association based on name
CN113411072B (zh) * 2021-07-13 2023-03-14 上海艾为电子技术股份有限公司 脉宽调制模块、音频功放电路及电子设备

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142066A (en) * 1977-12-27 1979-02-27 Bell Telephone Laboratories, Incorporated Suppression of idle channel noise in delta modulation systems
DE3002960A1 (de) * 1980-01-29 1981-09-10 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Adaptiver deltamodulator
US4812815A (en) * 1985-12-25 1989-03-14 Sharp Kabushiki Kaisha Digital-to-analog converter system
JPH07118651B2 (ja) * 1990-11-22 1995-12-18 ヤマハ株式会社 ディジタル・アナログ変換回路
JP3238587B2 (ja) * 1994-12-27 2001-12-17 バー−ブラウン・コーポレーション 自動ミューティング機能を備えたオーバーサンプリング型デジタル−アナログ変換器
US5986498A (en) * 1998-04-14 1999-11-16 Harman International Industries, Incorporated Audio direct from power supply
JP4387601B2 (ja) 2000-02-01 2009-12-16 アルパイン株式会社 デジタルアンプ
US6392476B1 (en) * 2000-03-14 2002-05-21 Harman International Industries, Incorporated System and method of producing direct audio from a power supply
KR20020056877A (ko) * 2000-05-25 2002-07-10 롤페스 요하네스 게라투스 알베르투스 로직 회로, 푸시 풀 증폭기, 로직 상태의 시퀀스 수행방법 및 핸드셰이킹 방법
DE60211872T2 (de) * 2001-03-26 2006-10-26 Harman International Industries, Incorporated, Northridge Pulsbreitemodulationsverstärker mit digitalem signalprozessor

Also Published As

Publication number Publication date
EP1435690B1 (de) 2007-05-02
US20040130389A1 (en) 2004-07-08
EP1435690A1 (de) 2004-07-07
JP2004214998A (ja) 2004-07-29
DE60313570T2 (de) 2008-01-03
US6919771B2 (en) 2005-07-19

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee