JP6210027B2 - 電力増幅器 - Google Patents
電力増幅器 Download PDFInfo
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- JP6210027B2 JP6210027B2 JP2014148293A JP2014148293A JP6210027B2 JP 6210027 B2 JP6210027 B2 JP 6210027B2 JP 2014148293 A JP2014148293 A JP 2014148293A JP 2014148293 A JP2014148293 A JP 2014148293A JP 6210027 B2 JP6210027 B2 JP 6210027B2
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- amplifier
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- speaker
- load
- feedback circuit
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- 230000003321 amplification Effects 0.000 claims description 39
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 39
- 230000010355 oscillation Effects 0.000 claims description 16
- 239000003990 capacitor Substances 0.000 description 30
- 238000001514 detection method Methods 0.000 description 21
- 238000010586 diagram Methods 0.000 description 18
- 230000005236 sound signal Effects 0.000 description 16
- 230000008878 coupling Effects 0.000 description 13
- 238000010168 coupling process Methods 0.000 description 13
- 238000005859 coupling reaction Methods 0.000 description 13
- 230000007423 decrease Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 239000004065 semiconductor Substances 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Images
Classifications
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- 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
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/342—Negative-feedback-circuit arrangements with or without positive feedback in field-effect 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
- H03F3/185—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
-
- 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
- H03F3/2171—Class D power amplifiers; Switching amplifiers with field-effect devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
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- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/129—Indexing scheme relating to amplifiers there being a feedback over the complete amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/144—Indexing scheme relating to amplifiers the feedback circuit of the amplifier stage comprising a passive resistor and passive capacitor
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/153—Feedback used to stabilise the amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/171—A filter circuit coupled to the output of an amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/301—Indexing scheme relating to amplifiers the loading circuit of an amplifying stage comprising a coil
-
- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/391—Indexing scheme relating to amplifiers the output circuit of an amplifying stage comprising an LC-network
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/462—Indexing scheme relating to amplifiers the current being sensed
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/546—A tunable capacitance being present in an amplifier circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/78—A comparator being used in a controlling circuit of an amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45521—Indexing scheme relating to differential amplifiers the FBC comprising op amp stages, e.g. cascaded stages of the dif amp and being coupled between the LC and the IC
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45522—Indexing scheme relating to differential amplifiers the FBC comprising one or more potentiometers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45526—Indexing scheme relating to differential amplifiers the FBC comprising a resistor-capacitor combination and being coupled between the LC and the IC
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45528—Indexing scheme relating to differential amplifiers the FBC comprising one or more passive resistors and being coupled between the LC and the IC
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
Description
図1は、この発明の第1実施形態である電力増幅器1の構成を示す回路図である。なお、図1では電力増幅器1の構成の理解を容易にするため、同電力増幅器1の負荷であるスピーカSPが併せて図示されている。
以上が本実施形態による電力増幅器1の構成である。
図2はこの発明の第2実施形態である電力増幅器1Aの構成を示す回路図である。なお、図2において、上記第1実施形態(図1)の各部と対応する部分には共通の符号を付し、その説明を省略する。
本実施形態においても上記第1実施形態と同様な効果が得られる。
図3はこの発明の第3実施形態である電力増幅器1Bの構成を示す回路図である。なお、図3において、上記第1実施形態(図1)の各部と対応する部分には共通の符号を付し、その説明を省略する。
図4はこの発明の第4実施形態である電力増幅器1Cの構成を示す回路図である。なお、図4において、上記第1実施形態(図1)の各部と対応する部分には共通の符号を付し、その説明を省略する。
図5はこの発明の第5実施形態である電力増幅器1Dの構成を示す回路図である。なお、図5において、上記第1実施形態(図1)の各部と対応する部分には共通の符号を付し、その説明を省略する。
図6はこの発明の第6実施形態である電力増幅器1Eの構成を示す回路図である。なお、図5において、上記第1実施形態(図1)の各部と対応する部分には共通の符号を付し、その説明を省略する。
本実施形態においても、上記第1実施形態と同様な効果が得られる。
図7はこの発明の第7実施形態である電力増幅器1Fの構成を示す回路図である。なお、図7において、上記第1実施形態(図1)の各部と対応する部分には共通の符号を付し、その説明を省略する。
図9はこの発明の第8実施形態である電力増幅器1Gの構成を示す回路図である。なお、図9において、上記第1実施形態(図1)の各部と対応する部分には共通の符号を付し、その説明を省略する。
Claims (5)
- 入力部を有し、前記入力部に入力される信号に応じて出力段であるスイッチング素子をスイッチングし、前記スイッチング素子を介して負荷に電源からの電流を出力するD級増幅部と、
前記負荷に流れる電流を前記D級増幅部の入力部に負帰還させる負荷電流帰還回路と、
前記D級増幅部の出力段と前記負荷との間に介在するフィルタに流れる電流を前記D級増幅部の入力部に負帰還させるフィルタ電流帰還回路と
を具備することを特徴とする電力増幅器。 - 入力部を有し、前記入力部に入力される信号に応じて出力段であるスイッチング素子をスイッチングし、前記スイッチング素子を介して負荷に電源からの電流を出力するD級増幅部と、
前記負荷に流れる電流を前記D級増幅部の入力部に負帰還させる負荷電流帰還回路とを具備し、
前記負荷電流帰還回路は、前記負荷に対する電圧を前記D級増幅器の入力部に負帰還させる負帰還量と、前記負荷に流れる電流を前記D級増幅部の入力部に負帰還させる負帰還量とのバランスを調整する負帰還量調整手段を含むことを特徴とする電力増幅器。 - 前記D級増幅部の入力部に負帰還される信号の経路に電気的特性の調整が可能な可変要素を含むことを特徴とする請求項1または2に記載の電力増幅器。
- 前記D級増幅部が自励発振型の増幅器であることを特徴とする請求項1〜3のいずれか1の請求項に記載の電力増幅器。
- 前記D級増幅部が他励発振型の増幅器であることを特徴とする請求項1〜3のいずれか1の請求項に記載の電力増幅器。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014148293A JP6210027B2 (ja) | 2014-07-18 | 2014-07-18 | 電力増幅器 |
EP15177394.2A EP2975763B1 (en) | 2014-07-18 | 2015-07-17 | Class d power amplifier |
CN201510422661.8A CN105281684B (zh) | 2014-07-18 | 2015-07-17 | 功率放大器 |
US14/802,412 US9647614B2 (en) | 2014-07-18 | 2015-07-17 | Power amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014148293A JP6210027B2 (ja) | 2014-07-18 | 2014-07-18 | 電力増幅器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2016025475A JP2016025475A (ja) | 2016-02-08 |
JP6210027B2 true JP6210027B2 (ja) | 2017-10-11 |
Family
ID=53673839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014148293A Active JP6210027B2 (ja) | 2014-07-18 | 2014-07-18 | 電力増幅器 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9647614B2 (ja) |
EP (1) | EP2975763B1 (ja) |
JP (1) | JP6210027B2 (ja) |
CN (1) | CN105281684B (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6269423B2 (ja) * | 2014-09-30 | 2018-01-31 | 株式会社Jvcケンウッド | 電力増幅装置および電力増幅方法 |
WO2018211085A1 (en) * | 2017-05-19 | 2018-11-22 | Danmarks Tekniske Universitet | A class-d audio amplifier |
JP7547206B2 (ja) * | 2017-12-07 | 2024-09-09 | ピューリファイ・アーペーエス | 制御ループ中に少なくとも2次フィルタを有する増幅器 |
US10833657B2 (en) * | 2018-08-06 | 2020-11-10 | Cirrus Logic, Inc. | Variable output resistance in a playback path with closed-loop pulse-width modulation driver |
TWI716797B (zh) * | 2019-01-04 | 2021-01-21 | 周重甫 | 動態阻抗調節音頻放大器架構及方法 |
US10749486B2 (en) * | 2019-01-11 | 2020-08-18 | Bose Corporation | Class D amplifier current feedback |
CN109728787A (zh) * | 2019-01-29 | 2019-05-07 | 王齐祥 | 一种功放电路 |
US10771020B1 (en) * | 2019-02-15 | 2020-09-08 | Fluke Corporation | Class D transconductance amplifier |
US11329610B2 (en) * | 2019-11-07 | 2022-05-10 | Chung-Fu Chou | Structure and method of audio amplifier with power feedback |
JP2021150674A (ja) * | 2020-03-16 | 2021-09-27 | ヤマハ株式会社 | 音響装置 |
CN115516875A (zh) * | 2020-06-15 | 2022-12-23 | 德州仪器公司 | 用以驱动电容性负载的具有过电流预测的控制电路 |
EP3968515A1 (en) * | 2020-09-09 | 2022-03-16 | Shenzhen Goodix Technology Co., Ltd. | Driver circuit arrangement for high capacitive load |
CN113054928B (zh) * | 2021-03-12 | 2023-08-29 | 苏州至盛半导体科技有限公司 | D类功放动态升压闭环控制器及动态升压的d类功放 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6134749Y2 (ja) * | 1979-09-28 | 1986-10-09 | ||
DE3836745A1 (de) * | 1988-10-28 | 1990-05-03 | Standard Elektrik Lorenz Ag | Verfahren und vorrichtung zur linearisierung des frequenzganges eines lautsprechersystems |
JPH07131272A (ja) * | 1993-10-29 | 1995-05-19 | N F Kairo Sekkei Block:Kk | 電力増幅装置 |
CN1170989A (zh) * | 1996-05-08 | 1998-01-21 | 贡小鸿 | 新型半导体管高保真电声功率放大器 |
NL1011002C2 (nl) * | 1999-01-12 | 2000-07-20 | Univ Eindhoven Tech | Versterkerschakeling. |
CN2422778Y (zh) * | 2000-04-03 | 2001-03-07 | 吴平 | 电流音频功率放大器 |
EP1500188A2 (en) | 2002-04-19 | 2005-01-26 | Koninklijke Philips Electronics N.V. | Power amplifier |
CN1549444A (zh) * | 2003-05-21 | 2004-11-24 | 平 吴 | 新型电流音频功率放大器 |
US7053705B2 (en) | 2003-12-22 | 2006-05-30 | Tymphany Corporation | Mixed-mode (current-voltage) audio amplifier |
US8224009B2 (en) | 2007-03-02 | 2012-07-17 | Bose Corporation | Audio system with synthesized positive impedance |
US7924091B2 (en) | 2008-03-11 | 2011-04-12 | Harman International Industries, Incorporated | Class-D transconductance amplifier |
US9008333B2 (en) | 2011-11-29 | 2015-04-14 | Quilter Labs, LLC | Guitar amplifier |
-
2014
- 2014-07-18 JP JP2014148293A patent/JP6210027B2/ja active Active
-
2015
- 2015-07-17 EP EP15177394.2A patent/EP2975763B1/en active Active
- 2015-07-17 CN CN201510422661.8A patent/CN105281684B/zh active Active
- 2015-07-17 US US14/802,412 patent/US9647614B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20160020735A1 (en) | 2016-01-21 |
JP2016025475A (ja) | 2016-02-08 |
US9647614B2 (en) | 2017-05-09 |
EP2975763B1 (en) | 2019-12-11 |
CN105281684B (zh) | 2018-06-19 |
CN105281684A (zh) | 2016-01-27 |
EP2975763A1 (en) | 2016-01-20 |
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