WO2008143124A1 - 増幅器 - Google Patents
増幅器 Download PDFInfo
- Publication number
- WO2008143124A1 WO2008143124A1 PCT/JP2008/058919 JP2008058919W WO2008143124A1 WO 2008143124 A1 WO2008143124 A1 WO 2008143124A1 JP 2008058919 W JP2008058919 W JP 2008058919W WO 2008143124 A1 WO2008143124 A1 WO 2008143124A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- load
- electric current
- amplifier
- generates
- detecting signal
- Prior art date
Links
- 230000005236 sound signal Effects 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
- H03G3/3005—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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Control Of Amplification And Gain Control (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
音源(4)からの音声信号を電圧制御増幅器(2)及びデジタルアンプ(6)で増幅して出力する。デジタルアンプ(6)から負荷に供給される負荷電流を検出し、その大きさを表す負荷電流検出信号を負荷電流検出器(8)が生成する。デジタルアンプ(6)から負荷に供給される負荷電圧を検出し、その大きさを表す電圧検出信号を負荷電圧検出器(10)が生成する。負荷電流検出信号と負荷電圧検出信号とが減算回路(18)に供給され、両者の差を表す差信号が生成される。この差信号に応じて電圧制御増幅器(2)のゲインが調整される。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-134058 | 2007-05-21 | ||
JP2007134058A JP4960764B2 (ja) | 2007-05-21 | 2007-05-21 | 増幅器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008143124A1 true WO2008143124A1 (ja) | 2008-11-27 |
Family
ID=40031832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/058919 WO2008143124A1 (ja) | 2007-05-21 | 2008-05-15 | 増幅器 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP4960764B2 (ja) |
WO (1) | WO2008143124A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011109642A (ja) * | 2009-10-23 | 2011-06-02 | Rohm Co Ltd | 初段増幅回路およびそれを用いた電子機器 |
GB2498602A (en) * | 2011-09-29 | 2013-07-24 | D & B Autotechnik Gmbh | Audio amplifier with output limiting circuit, suitable for use with a regulated power supply |
CN113589039A (zh) * | 2020-04-30 | 2021-11-02 | 株式会社村田制作所 | 负载检测电路及放大电路 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101157993B1 (ko) | 2011-12-22 | 2012-06-25 | 제이디미디어 주식회사 | 출력제어기능을 갖는 디지털 앰프 |
US9634566B2 (en) | 2014-02-04 | 2017-04-25 | Cirrus Logic, Inc. | Controlling the common mode voltage of a non-isolated buck-boost converter |
GB2545337B (en) * | 2014-05-08 | 2021-04-14 | Cirrus Logic Inc | System with multiple signal loops and switched mode converter |
US9628033B2 (en) | 2014-10-29 | 2017-04-18 | Cirrus Logic, Inc. | Power stage with switched mode amplifier and linear amplifier |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06188660A (ja) * | 1992-12-16 | 1994-07-08 | Nec Eng Ltd | 電力増幅回路 |
JP2004215078A (ja) * | 2003-01-07 | 2004-07-29 | Roland Corp | D級電力増幅装置 |
JP2007074431A (ja) * | 2005-09-07 | 2007-03-22 | Flying Mole Corp | 保護回路 |
-
2007
- 2007-05-21 JP JP2007134058A patent/JP4960764B2/ja active Active
-
2008
- 2008-05-15 WO PCT/JP2008/058919 patent/WO2008143124A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06188660A (ja) * | 1992-12-16 | 1994-07-08 | Nec Eng Ltd | 電力増幅回路 |
JP2004215078A (ja) * | 2003-01-07 | 2004-07-29 | Roland Corp | D級電力増幅装置 |
JP2007074431A (ja) * | 2005-09-07 | 2007-03-22 | Flying Mole Corp | 保護回路 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011109642A (ja) * | 2009-10-23 | 2011-06-02 | Rohm Co Ltd | 初段増幅回路およびそれを用いた電子機器 |
GB2498602A (en) * | 2011-09-29 | 2013-07-24 | D & B Autotechnik Gmbh | Audio amplifier with output limiting circuit, suitable for use with a regulated power supply |
GB2498602B (en) * | 2011-09-29 | 2014-06-11 | D & B Autotechnik Gmbh | Audio amplifier |
US9071212B2 (en) | 2011-09-29 | 2015-06-30 | D&B Audiotechnik Gmbh | Audio amplifier |
CN113589039A (zh) * | 2020-04-30 | 2021-11-02 | 株式会社村田制作所 | 负载检测电路及放大电路 |
Also Published As
Publication number | Publication date |
---|---|
JP4960764B2 (ja) | 2012-06-27 |
JP2008289047A (ja) | 2008-11-27 |
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