JP4731828B2 - D級アンプ - Google Patents
D級アンプ Download PDFInfo
- Publication number
- JP4731828B2 JP4731828B2 JP2004119160A JP2004119160A JP4731828B2 JP 4731828 B2 JP4731828 B2 JP 4731828B2 JP 2004119160 A JP2004119160 A JP 2004119160A JP 2004119160 A JP2004119160 A JP 2004119160A JP 4731828 B2 JP4731828 B2 JP 4731828B2
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- output
- signal
- current
- comparator
- 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 - Lifetime
Links
- 239000000872 buffer Substances 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 15
- 230000005236 sound signal Effects 0.000 description 15
- 230000010355 oscillation Effects 0.000 description 10
- 230000004048 modification Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 9
- 230000010354 integration Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 3
- 101100339482 Colletotrichum orbiculare (strain 104-T / ATCC 96160 / CBS 514.97 / LARS 414 / MAFF 240422) HOG1 gene Proteins 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000010356 wave oscillation Effects 0.000 description 1
Images
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
- H03F3/2171—Class D power amplifiers; Switching amplifiers with field-effect devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20718—Forced ventilation of a gaseous coolant
-
- 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
- H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20409—Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20509—Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Amplifiers (AREA)
Description
Aop=(Vsin−Vcom)×R104/(2×R101)
OUTP=(Vsin−Vcom)×R104×R112/(2×R101×R106)+Vcom
I243+I247=I244
となりI243<I244であるため反転しない。
I247=I241−I242
となっている。したがって、I247に応じてヒステリシス幅が変化する。
I244+I248=I243
となりI243>I244であるため反転しない。
I248=I242−I241
となっている。したがって、I248に応じてヒステリシス幅が変化する。
Claims (4)
- 電圧信号を電流変換して差動信号を出力する電圧制御電流源回路と、
前記差動信号の一方を第1の入力信号とし前記第1の入力信号及び電流変換された帰還信号により電荷が蓄積される第1の容量素子と、前記第1の容量素子の電位と基準電位とを比較してパルス幅変調信号を出力する第1のコンパレータと、前記第1のコンパレータの出力側に接続され前記容量素子に前記電流変換された帰還信号を出力する第1の帰還回路と、
前記差動信号の他方を第2の入力信号とし前記第2の入力信号及び電流変換された帰還信号により電荷が蓄積される第2の容量素子と、前記第2の容量素子の電位と基準電位とを比較してパルス幅変調信号を出力する第2のコンパレータと、前記第2のコンパレータの出力側に接続され前記容量素子に前記電流変換された帰還信号を出力する第2の帰還回路とを有し、
前記第1及び第2のコンパレータは、ヒステリシス特性を有し、かつ高入力インピーダンスを有するヒステリシスコンパレータである、
ことを特徴とするD級アンプ。 - 前記第1及び第2の入力信号にクロック信号を夫々重畳する第1及び第2のオシレータ回路を有する
ことを特徴とする請求項1記載のD級アンプ。 - 前記第1及び第2の帰還回路は、前記第1及び第2のコンパレータの出力を帰還する
ことを特徴とする請求項1又は2に記載のD級アンプ。 - 前記第1及び第2のコンパレータの出力を夫々増幅する第1及び第2の出力バッファを有し、
前記第1及び第2の帰還回路は夫々前記第1及び第2の出力バッファの出力を帰還することを特徴とする請求項1乃至3のいずれか1項に記載のD級アンプ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004119160A JP4731828B2 (ja) | 2004-04-14 | 2004-04-14 | D級アンプ |
US11/094,079 US7312657B2 (en) | 2004-04-14 | 2005-03-31 | Class D amplifier |
EP05007547A EP1587212A1 (en) | 2004-04-14 | 2005-04-06 | Class D amplifier |
KR1020050030015A KR100692164B1 (ko) | 2004-04-14 | 2005-04-11 | D 급 증폭기 |
CN2005100651959A CN1684360B (zh) | 2004-04-14 | 2005-04-14 | D类放大器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004119160A JP4731828B2 (ja) | 2004-04-14 | 2004-04-14 | D級アンプ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005303814A JP2005303814A (ja) | 2005-10-27 |
JP4731828B2 true JP4731828B2 (ja) | 2011-07-27 |
Family
ID=34934814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004119160A Expired - Lifetime JP4731828B2 (ja) | 2004-04-14 | 2004-04-14 | D級アンプ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7312657B2 (ja) |
EP (1) | EP1587212A1 (ja) |
JP (1) | JP4731828B2 (ja) |
KR (1) | KR100692164B1 (ja) |
CN (1) | CN1684360B (ja) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5313697B2 (ja) * | 2006-03-03 | 2013-10-09 | バング アンド オルフセン アイスパワー アクティーゼルスカブ | 自励発振増幅システム |
US7471144B2 (en) * | 2006-03-22 | 2008-12-30 | O2 Micro International Limited | Low distortion class-D amplifier |
US7501886B2 (en) | 2006-12-20 | 2009-03-10 | O2Micro, Inc. | Low distortion class-D amplifier |
US7598714B2 (en) * | 2006-07-12 | 2009-10-06 | Harman International Industries, Incorporated | Amplifier employing interleaved signals for PWM ripple suppression |
US7551028B1 (en) * | 2006-12-11 | 2009-06-23 | Marvell International Ltd. | Signal generators for current-mode three-level digital amplifiers |
JP4100455B1 (ja) | 2007-01-22 | 2008-06-11 | オンキヨー株式会社 | パルス幅変調回路及びそれを用いたスイッチングアンプ |
JP4785801B2 (ja) | 2007-07-20 | 2011-10-05 | ルネサスエレクトロニクス株式会社 | D級増幅器 |
JP4366540B2 (ja) | 2007-09-10 | 2009-11-18 | オンキヨー株式会社 | パルス幅変調回路及びそれを用いたスイッチングアンプ |
JP2009088698A (ja) * | 2007-09-27 | 2009-04-23 | Sanyo Electric Co Ltd | 半導体集積回路 |
JP4407743B2 (ja) | 2007-12-03 | 2010-02-03 | オンキヨー株式会社 | パルス幅変調回路及びそれを用いたスイッチングアンプ |
US7977820B2 (en) * | 2008-02-14 | 2011-07-12 | Supertex, Inc. | Ultrasound transmit pulse generator |
US8482346B2 (en) * | 2010-06-14 | 2013-07-09 | Harman International Industries, Incorporated | High efficiency balanced output amplifier system |
CN102545850A (zh) | 2010-12-15 | 2012-07-04 | 无锡华润上华半导体有限公司 | Pwm比较器及d类放大器 |
JP5810935B2 (ja) * | 2012-01-23 | 2015-11-11 | オンキヨー株式会社 | スイッチングアンプ |
JP5482885B1 (ja) * | 2012-12-28 | 2014-05-07 | オンキヨー株式会社 | パルス幅変調回路及びスイッチングアンプ |
CN103457582B (zh) * | 2013-08-27 | 2016-06-08 | 电子科技大学 | 一种脉冲宽度调制电路 |
US9461595B2 (en) | 2014-03-14 | 2016-10-04 | Qualcomm Incoporated | Integrator for class D audio amplifier |
EP3805898A1 (en) * | 2019-10-10 | 2021-04-14 | Thales Dis Design Services Sas | Electronic system for generating multiple power supply output voltages with one regulation loop |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5639606A (en) * | 1979-09-07 | 1981-04-15 | Matsushita Electric Ind Co Ltd | Self-excited type d-class amplifier |
JPH06326589A (ja) * | 1993-05-11 | 1994-11-25 | Mitsubishi Electric Corp | 半導体集積回路の出力回路 |
JPH0715304A (ja) * | 1993-03-17 | 1995-01-17 | Toshiba Corp | パルス幅変調回路 |
JPH11260083A (ja) * | 1997-12-31 | 1999-09-24 | St Microelectronics Srl | 電子メモリデバイス用行復号回路および行復号段階を制御する方法 |
JP2003110375A (ja) * | 2001-09-27 | 2003-04-11 | Yamaha Corp | 自走式pwm増幅器 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5742214A (en) | 1980-08-27 | 1982-03-09 | Sony Corp | Power amplifier |
JPS58130617A (ja) | 1982-01-29 | 1983-08-04 | Nippon Gakki Seizo Kk | パルス幅変調回路 |
JPH0728181B2 (ja) * | 1988-12-28 | 1995-03-29 | パイオニア株式会社 | パルス幅変調増幅回路 |
US5594386A (en) | 1995-04-21 | 1997-01-14 | Sipex Corporation | Pulse width modulated amplifier |
US5982231A (en) * | 1997-07-23 | 1999-11-09 | Linfinity Microelectronics, Inc. | Multiple channel class D audio amplifier |
JP2001148621A (ja) | 1999-11-19 | 2001-05-29 | Nec Corp | ヒステリシスコンパレータ |
JP4434557B2 (ja) | 2001-07-31 | 2010-03-17 | ヤマハ株式会社 | 電力増幅回路 |
-
2004
- 2004-04-14 JP JP2004119160A patent/JP4731828B2/ja not_active Expired - Lifetime
-
2005
- 2005-03-31 US US11/094,079 patent/US7312657B2/en active Active
- 2005-04-06 EP EP05007547A patent/EP1587212A1/en not_active Withdrawn
- 2005-04-11 KR KR1020050030015A patent/KR100692164B1/ko not_active IP Right Cessation
- 2005-04-14 CN CN2005100651959A patent/CN1684360B/zh not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5639606A (en) * | 1979-09-07 | 1981-04-15 | Matsushita Electric Ind Co Ltd | Self-excited type d-class amplifier |
JPH0715304A (ja) * | 1993-03-17 | 1995-01-17 | Toshiba Corp | パルス幅変調回路 |
JPH06326589A (ja) * | 1993-05-11 | 1994-11-25 | Mitsubishi Electric Corp | 半導体集積回路の出力回路 |
JPH11260083A (ja) * | 1997-12-31 | 1999-09-24 | St Microelectronics Srl | 電子メモリデバイス用行復号回路および行復号段階を制御する方法 |
JP2003110375A (ja) * | 2001-09-27 | 2003-04-11 | Yamaha Corp | 自走式pwm増幅器 |
Also Published As
Publication number | Publication date |
---|---|
US7312657B2 (en) | 2007-12-25 |
KR20060045584A (ko) | 2006-05-17 |
US20050231280A1 (en) | 2005-10-20 |
JP2005303814A (ja) | 2005-10-27 |
CN1684360A (zh) | 2005-10-19 |
CN1684360B (zh) | 2010-09-08 |
KR100692164B1 (ko) | 2007-03-12 |
EP1587212A1 (en) | 2005-10-19 |
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