JP6904179B2 - 増幅器、音響機器および制御方法 - Google Patents
増幅器、音響機器および制御方法 Download PDFInfo
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- JP6904179B2 JP6904179B2 JP2017170836A JP2017170836A JP6904179B2 JP 6904179 B2 JP6904179 B2 JP 6904179B2 JP 2017170836 A JP2017170836 A JP 2017170836A JP 2017170836 A JP2017170836 A JP 2017170836A JP 6904179 B2 JP6904179 B2 JP 6904179B2
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- amplifier
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- detection circuit
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- 238000000034 method Methods 0.000 title description 6
- 238000001514 detection method Methods 0.000 claims description 35
- 238000010586 diagram Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 230000003292 diminished effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- H03F1/02—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
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0216—Continuous control
- H03F1/0222—Continuous control by using a signal derived from the input signal
- H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters
-
- 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/36—Devices for manipulating acoustic surface waves
-
- 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
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0216—Continuous control
- H03F1/0222—Continuous control by using a signal derived from the input signal
-
- 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
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- 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
- H03F1/52—Circuit arrangements for protecting such 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
-
- 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
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
-
- 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
-
- 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
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/321—Use of a microprocessor in an amplifier circuit or its control circuit
-
- 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
- H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H03F2203/7227—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by a switch in the supply circuit of the amplifier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/004—Control by varying the supply voltage
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
- H04R2227/005—Audio distribution systems for home, i.e. multi-room use
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Multimedia (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
- Circuit For Audible Band Transducer (AREA)
Description
1B…パワードスピーカ
2…スピーカ
11…入力I/F
12…A/D変換器
13…DSP
14…D/A変換器
15…増幅回路
16…出力I/F
17…CPU
18…メモリ
19…RAM
21…パワーアンプ
22…入力検出回路
23…VI検出回路
50…スイッチ
Claims (7)
- 入力信号を増幅するアンプと、
前記アンプの後段に接続され、前記アンプの出力信号の電力を検出するVI検出回路と、
前記アンプがオフの場合に前記VI検出回路が所定値を超える電圧を検出した場合に前記アンプをオンにする、制御部と、
を備えた増幅器。 - 前記アンプの前段に接続され、前記アンプの前記入力信号のレベルを検出する入力検出回路を備え、
前記制御部は、前記入力検出回路の検出結果に基づいて前記入力信号が検出された場合に、前記アンプをオンにし、前記入力信号が検出されない場合に前記アンプをオフにする、
請求項1に記載の増幅器。 - 前記制御部は、前記入力信号が検出されない時間が所定時間を超える場合に、前記アンプをオフにする、
請求項2に記載の増幅器。 - 前記入力信号に所定の信号処理を施す信号処理回路をさらに備える、
請求項1乃至請求項3のいずれか1項に記載の増幅器。 - 複数のスピーカが接続され、
前記アンプおよび前記VI検出回路を、前記複数のスピーカのそれぞれについて複数備えた、
請求項1乃至請求項4のいずれか1項に記載の増幅器。 - 請求項1乃至請求項5のいずれか1項に記載の増幅器と、
前記出力信号を入力して放音するスピーカと、
を備えた音響機器。 - 入力信号を増幅するアンプの出力信号の電力を検出し、
前記アンプがオフの場合に、前記出力信号において所定値を超える電圧を検出した場合に前記アンプをオンにする、
増幅器の制御方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017170836A JP6904179B2 (ja) | 2017-09-06 | 2017-09-06 | 増幅器、音響機器および制御方法 |
US16/116,243 US10630240B2 (en) | 2017-09-06 | 2018-08-29 | Amplifier, audio device and control method |
CN201811025525.5A CN109462795B (zh) | 2017-09-06 | 2018-09-04 | 放大器、音响设备及控制方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017170836A JP6904179B2 (ja) | 2017-09-06 | 2017-09-06 | 増幅器、音響機器および制御方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2019047408A JP2019047408A (ja) | 2019-03-22 |
JP6904179B2 true JP6904179B2 (ja) | 2021-07-14 |
Family
ID=65518638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2017170836A Active JP6904179B2 (ja) | 2017-09-06 | 2017-09-06 | 増幅器、音響機器および制御方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US10630240B2 (ja) |
JP (1) | JP6904179B2 (ja) |
CN (1) | CN109462795B (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7332557B2 (ja) * | 2020-09-11 | 2023-08-23 | 株式会社東芝 | クリップ検出回路 |
CN113721753A (zh) * | 2021-08-30 | 2021-11-30 | 深圳市锐尔觅移动通信有限公司 | 功率放大器控制方法及装置、存储介质和电子设备 |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5340738U (ja) * | 1976-09-10 | 1978-04-08 | ||
JP3127813B2 (ja) * | 1995-12-05 | 2001-01-29 | ヤマハ株式会社 | オーディオ用アンプの保護回路 |
JPH11146496A (ja) * | 1997-11-05 | 1999-05-28 | Fujitsu Ten Ltd | スピーカの異常検出方法およびスピーカの異常検出装置 |
GB0219466D0 (en) * | 2002-08-21 | 2002-10-02 | Roke Manor Research | Multi-carrier power amplifier with switched PSU voltages |
JP3922182B2 (ja) * | 2002-12-27 | 2007-05-30 | ヤマハ株式会社 | 増幅回路 |
JP2006180049A (ja) * | 2004-12-21 | 2006-07-06 | Yamaha Corp | ディジタルアンプ |
JP4568858B2 (ja) * | 2005-03-14 | 2010-10-27 | 富士通テレコムネットワークス株式会社 | 電流バランス回路 |
US7400194B2 (en) * | 2006-06-08 | 2008-07-15 | The United States Of America As Represented By The National Security Agency | Method of amplifying a digital signal and device therefor |
US7697903B2 (en) * | 2006-12-06 | 2010-04-13 | Broadcom Corporation | Method and system for level detector calibration for accurate transmit power control |
JP2009303134A (ja) * | 2008-06-17 | 2009-12-24 | Panasonic Corp | 拡声システム |
JP5315826B2 (ja) * | 2008-07-16 | 2013-10-16 | パナソニック株式会社 | 誘導加熱式炊飯器 |
CN102224675B (zh) * | 2008-11-25 | 2014-04-02 | 应美盛股份有限公司 | 动态偏置放大器 |
JP2011019209A (ja) * | 2009-06-12 | 2011-01-27 | Sony Corp | 信号処理装置、信号処理方法 |
US8620238B2 (en) * | 2010-07-23 | 2013-12-31 | Blackberry Limited | Method of power amplifier switching power control using post power amplifier power detection |
KR101515930B1 (ko) * | 2013-06-04 | 2015-05-04 | 포항공과대학교 산학협력단 | 스위치 전류의 조절을 이용한 고효율 포락선 증폭기를 위한 장치 및 방법. |
EP3020129B1 (en) * | 2013-07-09 | 2021-12-08 | Skyworks Solutions, Inc. | Power amplifier with input power protection circuits |
CN103458341B (zh) * | 2013-09-09 | 2016-06-29 | 胡福生 | 一种应用于取消射极输出级的音频放大器附加电路 |
JP6149643B2 (ja) | 2013-09-24 | 2017-06-21 | オンキヨー株式会社 | 音声処理装置 |
CN110048678B (zh) * | 2014-08-29 | 2024-09-27 | 意法半导体研发(深圳)有限公司 | 用于音频放大器的高级电流限制功能 |
JP6507893B2 (ja) * | 2015-07-06 | 2019-05-08 | オンキヨー株式会社 | 増幅装置、及び、スピーカー装置 |
CN106686492B (zh) * | 2017-01-22 | 2019-06-25 | 深圳市华星光电技术有限公司 | 一种音频输出电路及音频设备 |
US10236831B2 (en) * | 2017-05-12 | 2019-03-19 | Skyworks Solutions, Inc. | Envelope trackers providing compensation for power amplifier output load variation |
-
2017
- 2017-09-06 JP JP2017170836A patent/JP6904179B2/ja active Active
-
2018
- 2018-08-29 US US16/116,243 patent/US10630240B2/en active Active
- 2018-09-04 CN CN201811025525.5A patent/CN109462795B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
CN109462795B (zh) | 2021-03-19 |
US20190074798A1 (en) | 2019-03-07 |
CN109462795A (zh) | 2019-03-12 |
US10630240B2 (en) | 2020-04-21 |
JP2019047408A (ja) | 2019-03-22 |
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