JP4917650B2 - 合成された正のインピーダンスを有するオーディオシステム - Google Patents
合成された正のインピーダンスを有するオーディオシステム Download PDFInfo
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- JP4917650B2 JP4917650B2 JP2009551844A JP2009551844A JP4917650B2 JP 4917650 B2 JP4917650 B2 JP 4917650B2 JP 2009551844 A JP2009551844 A JP 2009551844A JP 2009551844 A JP2009551844 A JP 2009551844A JP 4917650 B2 JP4917650 B2 JP 4917650B2
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- 230000004044 response Effects 0.000 description 23
- 238000006073 displacement reaction Methods 0.000 description 10
- 230000005236 sound signal Effects 0.000 description 8
- 238000013016 damping Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005355 Hall effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
- H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/028—Structural combinations of loudspeakers with built-in power amplifiers, e.g. in the same acoustic enclosure
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Description
一般に、高いQの共鳴と、最適でない出力周波数応答とを生じる。2次共鳴のQは、Qを所望のレベルに減少させるように、増幅器の出力インピーダンスを増加させる負電流フィードバックを使用して制御される。これにより、システムにおいて変換器を高い効率で使用することを可能にする一方で、許容できない周波数応答を生じる。
206 エンクロージャ
208 変換器
209 ドローン
210 電流センサ
212 増幅器
214 フィルタ
310,311 感知抵抗器
312a,312b 入力端子
313a,313b 負荷端子
326 増幅器
326a,326b 増幅器326の入力
Claims (13)
- ブリッジ構成におけるスイッチング増幅器の負荷を流れる電流を感知する電気的装置であって、
基準と相対的な第1入力電圧を有する第1入力端子(312a)と、
前記基準と相対的な第2入力電圧を有する第2入力端子(313b)と、
前記基準と相対的な第1負荷電圧を有する第1負荷端子(312b)と、
前記基準と相対的な第2負荷電圧を有する第2負荷端子(313a)と、
前記第1入力端子と第1負荷端子との間に接続された第1電流感知エレメント(310)と、
前記第2入力端子と第2負荷端子との間に接続された第2電流感知エレメント(311)とを具備し、
第1感知電圧(326a)は、前記第1入力電圧と第2負荷電圧との間の関係によって決定されるとともに、第2感知電圧(326b)は、前記第2入力電圧と第1負荷電圧との間の関係によって決定されることを特徴とする装置。 - 前記基準は、回路コモン、回路グランド、およびアース接続からなるグループから選択されることを特徴とする請求項1に記載の装置。
- 前記第1電流感知エレメントは、抵抗エレメントであることを特徴とする請求項1に記載の装置。
- 前記第1電流感知エレメントは、本質的に零抵抗であることを特徴とする請求項1に記載の装置。
- 分圧器を形成する2つの抵抗エレメントのセットをさらに具備し、
前記第1感知電圧は、前記分圧器によって感知されることを特徴とする請求項1に記載の装置。 - 前記2つの抵抗エレメントは、およそ等しい抵抗を有することを特徴とする請求項5に記載の装置。
- 前記第1入力電圧および第2入力電圧は、ほぼ一定のコモンモード電圧を有することを特徴とする請求項1に記載の装置。
- 前記第1入力電圧および第2入力電圧の平均は、前記スイッチング増幅器の動作範囲にわたってほぼ一定であることを特徴とする請求項1に記載の装置。
- 電圧差動増幅器をさらに具備し、
前記電圧差動増幅器は、前記第1感知電圧と第2感知電圧との差を感知することを特徴とする請求項1に記載の装置。 - 前記電圧差動増幅器は、前記第1入力電圧の電圧範囲よりも小さい範囲のコモンモードを有することを特徴とする請求項9に記載の装置。
- 前記スイッチング増幅器をさらに具備し、
前記増幅器は、ブリッジ増幅器の出力セットを有し、
前記第1入力電圧および第2入力電圧は、前記ブリッジ増幅器の出力セットから得られることを特徴とする請求項1に記載の装置。 - フィルタをさらに具備し、
前記ブリッジ増幅器の出力セットは、前記フィルタによって変更されるとともに、前記第1入力端子および第2入力端子に接続されることを特徴とする請求項11に記載の装置。 - 前記負荷と接続するために、前記第1電流感知エレメントを出力端子に接続する電気的フィルタモジュールをさらに具備することを特徴とする請求項1に記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/681,621 US8224009B2 (en) | 2007-03-02 | 2007-03-02 | Audio system with synthesized positive impedance |
US11/681,621 | 2007-03-02 | ||
PCT/US2008/055267 WO2008109327A2 (en) | 2007-03-02 | 2008-02-28 | Audio system with synthesized positive impedance |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010520670A JP2010520670A (ja) | 2010-06-10 |
JP4917650B2 true JP4917650B2 (ja) | 2012-04-18 |
Family
ID=39434308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009551844A Active JP4917650B2 (ja) | 2007-03-02 | 2008-02-28 | 合成された正のインピーダンスを有するオーディオシステム |
Country Status (6)
Country | Link |
---|---|
US (2) | US8224009B2 (ja) |
EP (1) | EP2119305B1 (ja) |
JP (1) | JP4917650B2 (ja) |
CN (1) | CN101627639B (ja) |
HK (1) | HK1132388A1 (ja) |
WO (1) | WO2008109327A2 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4661694B2 (ja) * | 2006-06-05 | 2011-03-30 | 日産自動車株式会社 | 吸気増音装置 |
JP4661695B2 (ja) * | 2006-06-05 | 2011-03-30 | 日産自動車株式会社 | 吸気音強調装置 |
US8384478B2 (en) * | 2010-03-04 | 2013-02-26 | Bose Corporation | Versatile audio power amplifier |
EP2541970B1 (en) | 2011-06-29 | 2014-01-01 | ST-Ericsson SA | Pre-filtering for loudspeakers protection |
EP2632174B1 (en) * | 2012-02-27 | 2016-10-26 | ST-Ericsson SA | A circuit for use with a loudspeaker for portable equipments |
DE112012006847T5 (de) | 2012-08-27 | 2015-05-28 | Mitsubishi Electric Corporation | Schaltsteuerschaltung und Schaltleistungsversorgungsvorrichtung |
JP6100641B2 (ja) * | 2013-07-29 | 2017-03-22 | 日本電波工業株式会社 | 差動発振器 |
US9467100B2 (en) * | 2014-07-17 | 2016-10-11 | Qualcomm Incorporated | Reference amplifier coupled to a voltage divider circuit to provide feedback for an amplifier |
JP6210027B2 (ja) | 2014-07-18 | 2017-10-11 | ヤマハ株式会社 | 電力増幅器 |
CN106454630B (zh) * | 2016-09-12 | 2021-01-19 | 深圳市冠旭电子股份有限公司 | 一种基于音箱输出的功率控制电路 |
JP2023105337A (ja) * | 2022-01-19 | 2023-07-31 | サンデン株式会社 | アクティブフィルタ装置及びそれを備えた電動圧縮機 |
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JPH05344596A (ja) * | 1992-06-05 | 1993-12-24 | Mitsubishi Electric Corp | 音響装置 |
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JP2005223717A (ja) * | 2004-02-06 | 2005-08-18 | Sharp Corp | オーディオアンプ |
JP2006094148A (ja) * | 2004-09-24 | 2006-04-06 | Denon Ltd | デジタルアンプ |
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2007
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2008
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- 2008-02-28 WO PCT/US2008/055267 patent/WO2008109327A2/en active Application Filing
- 2008-02-28 JP JP2009551844A patent/JP4917650B2/ja active Active
- 2008-02-28 CN CN200880006839.9A patent/CN101627639B/zh not_active Expired - Fee Related
-
2009
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2012
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JPH01272297A (ja) * | 1988-04-25 | 1989-10-31 | Yamaha Corp | 駆動装置 |
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Also Published As
Publication number | Publication date |
---|---|
US9049501B2 (en) | 2015-06-02 |
JP2010520670A (ja) | 2010-06-10 |
US20080212818A1 (en) | 2008-09-04 |
US20130182859A1 (en) | 2013-07-18 |
CN101627639A (zh) | 2010-01-13 |
EP2119305B1 (en) | 2014-02-26 |
HK1132388A1 (en) | 2010-02-19 |
US8224009B2 (en) | 2012-07-17 |
WO2008109327A3 (en) | 2009-03-12 |
WO2008109327A2 (en) | 2008-09-12 |
EP2119305A2 (en) | 2009-11-18 |
CN101627639B (zh) | 2013-02-13 |
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