JP2013093800A - オーディオ機器の出力回路とその制御方法、及びそれを備えた電子機器 - Google Patents
オーディオ機器の出力回路とその制御方法、及びそれを備えた電子機器 Download PDFInfo
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- JP2013093800A JP2013093800A JP2011235994A JP2011235994A JP2013093800A JP 2013093800 A JP2013093800 A JP 2013093800A JP 2011235994 A JP2011235994 A JP 2011235994A JP 2011235994 A JP2011235994 A JP 2011235994A JP 2013093800 A JP2013093800 A JP 2013093800A
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- output
- output amplifier
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- output circuit
- amplifier
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 14
- 230000001419 dependent effect Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 1
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Classifications
-
- 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
- H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply
-
- 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
- H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
Abstract
【解決手段】出力アンプ1を備えたオーディオ機器の出力回路において、前記出力アンプ1の接地レベルへの遷移終了後に、前記出力アンプ1の出力端子1aを接地に短絡するスイッチ素子をさらに備える。ここで、前記スイッチ素子を前記出力アンプ1のNチャネルドライバトランジスタ5により代用した。
【選択図】図1
Description
1a…出力アンプの出力端子、
2…オーディオ機器の出力端子、
3…DCカット容量、
4…負荷抵抗、
5…Nチャネルドライバトランジスタ。
Claims (5)
- 出力アンプを備えたオーディオ機器の出力回路において、
前記出力アンプの接地レベルへの遷移終了後に、前記出力アンプの出力端子を接地に短絡するスイッチ素子をさらに備えたことを特徴とするオーディオ機器の出力回路。 - 前記スイッチ素子を前記出力アンプのNチャネルドライバトランジスタにより代用したことを特徴とする請求項1記載のオーディオ機器の出力回路。
- 請求項1又は2記載のオーディオ機器の出力回路を備えたことを特徴とする電子機器。
- 出力アンプを備えたオーディオ機器の出力回路の制御方法において、
前記出力アンプの接地レベルへの遷移終了後に、スイッチ素子が、前記出力アンプの出力端子を接地に短絡するステップを含むことを特徴とするオーディオ機器の出力回路の制御方法。 - 前記スイッチ素子を前記出力アンプのNチャネルドライバトランジスタにより代用したことを特徴とする請求項4記載のオーディオ機器の出力回路の制御方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011235994A JP2013093800A (ja) | 2011-10-27 | 2011-10-27 | オーディオ機器の出力回路とその制御方法、及びそれを備えた電子機器 |
US13/652,542 US8901999B2 (en) | 2011-10-27 | 2012-10-16 | Audio-output amplifier circuit for audio device, audio device, electronic device including audio device, and output control method for audio device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011235994A JP2013093800A (ja) | 2011-10-27 | 2011-10-27 | オーディオ機器の出力回路とその制御方法、及びそれを備えた電子機器 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2013093800A true JP2013093800A (ja) | 2013-05-16 |
Family
ID=48171786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011235994A Pending JP2013093800A (ja) | 2011-10-27 | 2011-10-27 | オーディオ機器の出力回路とその制御方法、及びそれを備えた電子機器 |
Country Status (2)
Country | Link |
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US (1) | US8901999B2 (ja) |
JP (1) | JP2013093800A (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9854357B1 (en) * | 2016-06-28 | 2017-12-26 | Cirrus Logic, Inc. | Minimizing startup transients in an audio playback path |
CN108076417B (zh) * | 2016-11-18 | 2020-09-01 | 扬智科技股份有限公司 | 输出级电路 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59198012A (ja) * | 1983-04-25 | 1984-11-09 | Mitsubishi Electric Corp | 電源投入時過渡音軽減回路 |
JPH0741208Y2 (ja) * | 1989-10-12 | 1995-09-20 | 東芝エンジニアリング株式会社 | 絶縁アンプの誤出力防止回路 |
US6316993B1 (en) * | 1999-02-22 | 2001-11-13 | Texas Instruments Incorporated | Analog circuitry for start-up glitch suppression |
JP2002111390A (ja) * | 2000-09-28 | 2002-04-12 | Mitsumi Electric Co Ltd | オーディオアンプのショックノイズ防止回路 |
US20050025322A1 (en) * | 2003-07-28 | 2005-02-03 | Henson Matthew Brady | Pop and click reduction using DAC power up and power down processing |
JP2005109654A (ja) * | 2003-09-29 | 2005-04-21 | Ricoh Co Ltd | ポップ音低減回路、ポップ音低減方式、定電圧回路、及び増幅回路 |
WO2011003691A1 (en) * | 2009-07-07 | 2011-01-13 | Mediatek Singapore Pte. Ltd. | The double integral method of powering up or down a speaker |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7092534B2 (en) * | 2004-03-02 | 2006-08-15 | Via Telecom Co., Ltd. | Method and system for reducing pop noise of a sound broadcasting instrument |
JP2009290411A (ja) * | 2008-05-28 | 2009-12-10 | Nec Electronics Corp | 低雑音受信装置 |
JP2010021775A (ja) | 2008-07-10 | 2010-01-28 | Ricoh Co Ltd | ポップ音低減回路を備えたオーディオ回路 |
US7880540B2 (en) * | 2009-02-23 | 2011-02-01 | Mediatek Inc. | Amplifying system and related method |
JP2011029683A (ja) | 2009-07-21 | 2011-02-10 | Ricoh Co Ltd | オーディオアンプのポップ音低減回路とそれを具備したオーディオ回路 |
US8482347B2 (en) * | 2010-12-13 | 2013-07-09 | Broadcom Corporation | Amplifier with reduced on/off transient and multi-point offset compensation |
-
2011
- 2011-10-27 JP JP2011235994A patent/JP2013093800A/ja active Pending
-
2012
- 2012-10-16 US US13/652,542 patent/US8901999B2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59198012A (ja) * | 1983-04-25 | 1984-11-09 | Mitsubishi Electric Corp | 電源投入時過渡音軽減回路 |
JPH0741208Y2 (ja) * | 1989-10-12 | 1995-09-20 | 東芝エンジニアリング株式会社 | 絶縁アンプの誤出力防止回路 |
US6316993B1 (en) * | 1999-02-22 | 2001-11-13 | Texas Instruments Incorporated | Analog circuitry for start-up glitch suppression |
JP2002111390A (ja) * | 2000-09-28 | 2002-04-12 | Mitsumi Electric Co Ltd | オーディオアンプのショックノイズ防止回路 |
US20050025322A1 (en) * | 2003-07-28 | 2005-02-03 | Henson Matthew Brady | Pop and click reduction using DAC power up and power down processing |
JP2005109654A (ja) * | 2003-09-29 | 2005-04-21 | Ricoh Co Ltd | ポップ音低減回路、ポップ音低減方式、定電圧回路、及び増幅回路 |
WO2011003691A1 (en) * | 2009-07-07 | 2011-01-13 | Mediatek Singapore Pte. Ltd. | The double integral method of powering up or down a speaker |
Also Published As
Publication number | Publication date |
---|---|
US8901999B2 (en) | 2014-12-02 |
US20130106510A1 (en) | 2013-05-02 |
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