JP6481669B2 - 増幅装置 - Google Patents
増幅装置 Download PDFInfo
- Publication number
- JP6481669B2 JP6481669B2 JP2016164435A JP2016164435A JP6481669B2 JP 6481669 B2 JP6481669 B2 JP 6481669B2 JP 2016164435 A JP2016164435 A JP 2016164435A JP 2016164435 A JP2016164435 A JP 2016164435A JP 6481669 B2 JP6481669 B2 JP 6481669B2
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- JP
- Japan
- Prior art keywords
- microcomputer
- current consumption
- set value
- value
- detection circuit
- 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.)
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Links
- 238000001514 detection method Methods 0.000 claims description 29
- 230000005236 sound signal Effects 0.000 claims description 25
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 230000006870 function Effects 0.000 description 36
- 238000000034 method Methods 0.000 description 16
- 238000004804 winding Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000008520 organization 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
- H03F1/30—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
- H03F3/20—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
- 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
- H03F2200/321—Use of a microprocessor in an amplifier circuit or its control circuit
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/447—Indexing scheme relating to amplifiers the amplifier being protected to temperature influence
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
2 マイクロコンピューター(制御部)
3 操作部
4 表示部
5 PWM変調器(信号処理部)
6 検出回路
7 スイッチング電源
8 スピーカー
Claims (6)
- 音声信号を増幅する増幅装置であって、
設定値以下に前記音声信号のダイナミックレンジをコントロールする信号処理部と、
電源の消費電流に応じて、前記設定値を設定する制御部と、
前記消費電流を検出するための検出回路と、を備え、
前記信号処理部は、PWM変調器であり、
前記制御部は、前記検出回路が異常であると感知した場合、前記PWM変調器の出力を停止することを特徴とする増幅装置。 - 前記制御部は、前記消費電流が所定の閾値以上である場合に、前記設定値を所定値に設定することを特徴とする請求項1に記載の増幅装置。
- 前記制御部は、前記消費電流が前記所定の閾値以上である状態が、所定時間連続した場合に、前記設定値を前記所定値に設定することを特徴とする請求項2に記載の増幅装置。
- 前記検出回路は、前記消費電流を、前記消費電流に応じた電圧に変換し、
前記制御部は、前記検出回路が変換した電圧に応じて、前記設定値を設定することを特徴とする請求項1〜3のいずれか1項に記載の増幅装置。 - 前記電源として、各部に電源電圧を供給するスイッチング電源をさらに備えることを特徴とする請求項1〜4のいずれか1項に記載の増幅装置。
- 前記制御部は、前記消費電流に応じて、前記設定値を1dBずつ変更することを特徴とする請求項1に記載の増幅装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016164435A JP6481669B2 (ja) | 2016-08-25 | 2016-08-25 | 増幅装置 |
EP17185179.3A EP3297158A3 (en) | 2016-08-25 | 2017-08-07 | Amplifier |
US15/673,991 US10008988B2 (en) | 2016-08-25 | 2017-08-10 | Amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016164435A JP6481669B2 (ja) | 2016-08-25 | 2016-08-25 | 増幅装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2018033019A JP2018033019A (ja) | 2018-03-01 |
JP6481669B2 true JP6481669B2 (ja) | 2019-03-13 |
Family
ID=59579415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2016164435A Active JP6481669B2 (ja) | 2016-08-25 | 2016-08-25 | 増幅装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US10008988B2 (ja) |
EP (1) | EP3297158A3 (ja) |
JP (1) | JP6481669B2 (ja) |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3701493A1 (de) * | 1987-01-20 | 1988-07-28 | Nixdorf Computer Ag | Schaltungsanordnung zum verteilen elektrischer speiseleistung auf mehrere funktionseinheiten |
US5029299A (en) * | 1990-05-09 | 1991-07-02 | Altec Lansing Corporation | Power amplifier with current limiting means |
JP3774385B2 (ja) * | 2001-07-26 | 2006-05-10 | 株式会社デノン | 増幅器の保護回路 |
US20030118193A1 (en) * | 2001-12-21 | 2003-06-26 | Leske Lawrence A. | Method and system for digitally controlling a speaker |
JP3922182B2 (ja) * | 2002-12-27 | 2007-05-30 | ヤマハ株式会社 | 増幅回路 |
JP2005018511A (ja) * | 2003-06-27 | 2005-01-20 | Victor Co Of Japan Ltd | 定電圧電源装置の出力制限回路 |
JP2005072983A (ja) * | 2003-08-25 | 2005-03-17 | Matsushita Electric Ind Co Ltd | 音声信号増幅装置及び音響装置 |
CN100525083C (zh) * | 2004-01-07 | 2009-08-05 | 奥特蓝星技术股份有限公司 | 提供改进的脉宽调节放大器的电源拒斥的装置和方法 |
JP2008054260A (ja) * | 2006-08-28 | 2008-03-06 | Kenwood Corp | 受信高周波回路 |
US8214007B2 (en) * | 2006-11-01 | 2012-07-03 | Welch Allyn, Inc. | Body worn physiological sensor device having a disposable electrode module |
US7994798B2 (en) * | 2007-11-30 | 2011-08-09 | Caterpillar Inc. | Power converter current sensor testing method |
US9425747B2 (en) * | 2008-03-03 | 2016-08-23 | Qualcomm Incorporated | System and method of reducing power consumption for audio playback |
JP5440034B2 (ja) * | 2009-08-31 | 2014-03-12 | 株式会社Jvcケンウッド | オーディオ装置 |
EP3076545B1 (en) | 2010-02-10 | 2020-12-16 | Goodix Technology (HK) Company Limited | System and method for adapting a loudspeaker signal |
JP5538982B2 (ja) * | 2010-04-02 | 2014-07-02 | アルパイン株式会社 | 消費電流制御装置および消費電流制御方法 |
US9124219B2 (en) * | 2010-07-01 | 2015-09-01 | Conexant Systems, Inc. | Audio driver system and method |
EP2642769B1 (en) | 2012-03-20 | 2017-12-13 | Nxp B.V. | A loudspeaker drive circuit for determining loudspeaker characteristics and/or diagnostics |
JP6326810B2 (ja) | 2013-12-25 | 2018-05-23 | オンキヨー株式会社 | 増幅装置 |
US9900708B2 (en) * | 2013-12-27 | 2018-02-20 | Gn Hearing A/S | Hearing instrument with switchable power supply voltage |
JP2016116168A (ja) * | 2014-12-17 | 2016-06-23 | オンキヨー株式会社 | オーディオ装置 |
US9559642B2 (en) * | 2015-01-02 | 2017-01-31 | Logitech Europe, S.A. | Audio delivery system having an improved efficiency and extended operation time between recharges or battery replacements |
JP6456249B2 (ja) * | 2015-06-02 | 2019-01-23 | アルパイン株式会社 | オーディオ装置、電流制御プログラムおよび電流制御方法 |
-
2016
- 2016-08-25 JP JP2016164435A patent/JP6481669B2/ja active Active
-
2017
- 2017-08-07 EP EP17185179.3A patent/EP3297158A3/en not_active Withdrawn
- 2017-08-10 US US15/673,991 patent/US10008988B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3297158A2 (en) | 2018-03-21 |
JP2018033019A (ja) | 2018-03-01 |
US10008988B2 (en) | 2018-06-26 |
US20180062584A1 (en) | 2018-03-01 |
EP3297158A3 (en) | 2018-05-02 |
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