TW200633365A - Audio frequency signal amplifier and electrical machine using the same - Google Patents
Audio frequency signal amplifier and electrical machine using the sameInfo
- Publication number
- TW200633365A TW200633365A TW095100468A TW95100468A TW200633365A TW 200633365 A TW200633365 A TW 200633365A TW 095100468 A TW095100468 A TW 095100468A TW 95100468 A TW95100468 A TW 95100468A TW 200633365 A TW200633365 A TW 200633365A
- Authority
- TW
- Taiwan
- Prior art keywords
- frequency signal
- audio frequency
- amplifier
- main amplifier
- soundless
- Prior art date
Links
- 101100042615 Arabidopsis thaliana SIGD gene Proteins 0.000 abstract 1
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
Classifications
-
- 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
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
-
- 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
- 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
- H03F3/2178—Class D power amplifiers; Switching amplifiers using more than one switch or switching amplifier in parallel or in series
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated
-
- 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
- H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
- H03G3/3021—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable by varying the duty cycle
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
- Control Of Amplification And Gain Control (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005040931 | 2005-02-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200633365A true TW200633365A (en) | 2006-09-16 |
Family
ID=36916281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW095100468A TW200633365A (en) | 2005-02-17 | 2006-01-05 | Audio frequency signal amplifier and electrical machine using the same |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090010457A1 (zh) |
JP (1) | JP4455647B2 (zh) |
CN (1) | CN101124724A (zh) |
TW (1) | TW200633365A (zh) |
WO (1) | WO2006087870A1 (zh) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101288939B1 (ko) * | 2006-08-24 | 2013-07-24 | 삼성전자주식회사 | 휴대 전화기의 잡음 제거 회로 |
JP5095312B2 (ja) * | 2007-08-31 | 2012-12-12 | ラピスセミコンダクタ株式会社 | D級増幅回路 |
JP2010093624A (ja) * | 2008-10-09 | 2010-04-22 | Panasonic Corp | 音声出力装置 |
TWI392224B (zh) * | 2009-04-16 | 2013-04-01 | Realtek Semiconductor Corp | 音頻處理晶片及其音頻訊號處理方法 |
CN101938257B (zh) * | 2009-06-30 | 2016-06-01 | 瑞昱半导体股份有限公司 | 音频处理芯片及其音频信号处理方法 |
JP5069323B2 (ja) * | 2010-02-02 | 2012-11-07 | 旭化成エレクトロニクス株式会社 | ポップ音防止回路およびポップ音防止方法 |
EP2521256A1 (en) * | 2011-04-27 | 2012-11-07 | ABA Electronics Technology Co. Ltd. | Energy-saving audio-amplifier control device |
US20120275624A1 (en) * | 2011-04-28 | 2012-11-01 | Szuyu Ho | Energy-saving audio-amplifier control device |
US8717097B2 (en) * | 2011-06-28 | 2014-05-06 | Qualcomm Incorporated | Amplifier with improved noise reduction |
CN102801390B (zh) * | 2012-09-07 | 2015-01-07 | 电子科技大学 | 用于d类音频放大器中的pop噪声抑制电路 |
WO2014134153A1 (en) * | 2013-02-26 | 2014-09-04 | The University Of Akron | Direct-drive digital audio amplifier for electrostatic loudspeakers |
US9014300B2 (en) * | 2013-09-12 | 2015-04-21 | Qualcomm Incorporated | Switched-mode high-linearity transmitter using pulse width modulation |
CN104104452B (zh) * | 2014-06-24 | 2016-08-24 | 努比亚技术有限公司 | 基于pwm调制的音频解调方法和解调器 |
JP6499523B2 (ja) * | 2015-06-15 | 2019-04-10 | 株式会社デンソーテン | スピーカ及び伝送装置 |
US10418950B1 (en) * | 2018-05-09 | 2019-09-17 | Semiconductor Components Industries, Llc | Methods and apparatus for a class-D amplifier |
JP7239376B2 (ja) * | 2019-03-29 | 2023-03-14 | ラピスセミコンダクタ株式会社 | 再生装置 |
JP2022051329A (ja) | 2020-09-18 | 2022-03-31 | 株式会社東芝 | D級アンプ |
CN113285694A (zh) * | 2021-05-31 | 2021-08-20 | 杭州雄迈集成电路技术股份有限公司 | 音频codec滤波器静音电路及其控制方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0463004A (ja) * | 1990-06-29 | 1992-02-28 | Nec Corp | 増幅回路 |
JPH1188066A (ja) * | 1997-09-05 | 1999-03-30 | Hitachi Ltd | オーディオパワーアンプic |
JP3920475B2 (ja) * | 1998-11-04 | 2007-05-30 | 株式会社東芝 | ディジタル振幅変調送信機 |
JP3410061B2 (ja) * | 2000-02-07 | 2003-05-26 | 株式会社 デジアン・テクノロジー | D級アンプ |
US6452366B1 (en) * | 2000-02-11 | 2002-09-17 | Champion Microelectronic Corp. | Low power mode and feedback arrangement for a switching power converter |
US6512416B2 (en) * | 2000-07-03 | 2003-01-28 | Broadcom Corporation | Extended range variable gain amplifier |
US6538590B1 (en) * | 2001-04-02 | 2003-03-25 | Cirrus Logic, Inc. | Transient noise reduction circuits, systems and methods in power digital-to-analog converters |
US6621335B2 (en) * | 2001-04-18 | 2003-09-16 | Microsemi Corporation | Class D amplifier with passive RC network |
US20020169603A1 (en) * | 2001-05-04 | 2002-11-14 | Texas Instruments Incorporated | ADC resolution enhancement through subband coding |
JP2004080356A (ja) * | 2002-08-16 | 2004-03-11 | Nec Corp | バイアス回路およびそれを用いた電力増幅装置 |
-
2005
- 2005-12-22 WO PCT/JP2005/023640 patent/WO2006087870A1/ja not_active Application Discontinuation
- 2005-12-22 CN CNA2005800483769A patent/CN101124724A/zh active Pending
- 2005-12-22 US US11/816,361 patent/US20090010457A1/en not_active Abandoned
- 2005-12-22 JP JP2007503588A patent/JP4455647B2/ja not_active Expired - Fee Related
-
2006
- 2006-01-05 TW TW095100468A patent/TW200633365A/zh unknown
Also Published As
Publication number | Publication date |
---|---|
US20090010457A1 (en) | 2009-01-08 |
CN101124724A (zh) | 2008-02-13 |
JPWO2006087870A1 (ja) | 2008-07-03 |
WO2006087870A1 (ja) | 2006-08-24 |
JP4455647B2 (ja) | 2010-04-21 |
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