JP6699073B2 - 自励式d級増幅器 - Google Patents
自励式d級増幅器 Download PDFInfo
- Publication number
- JP6699073B2 JP6699073B2 JP2016062740A JP2016062740A JP6699073B2 JP 6699073 B2 JP6699073 B2 JP 6699073B2 JP 2016062740 A JP2016062740 A JP 2016062740A JP 2016062740 A JP2016062740 A JP 2016062740A JP 6699073 B2 JP6699073 B2 JP 6699073B2
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- JP
- Japan
- Prior art keywords
- amplifier
- circuit
- signal
- comparator
- output
- 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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Classifications
-
- 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
- H03F3/2171—Class D power amplifiers; Switching amplifiers with field-effect devices
-
- 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
- H03F3/185—Low frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
-
- 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
- H03F2200/171—A filter circuit coupled to the output of an amplifier
-
- 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
- H03F2200/78—A comparator being used in a controlling circuit of an amplifier
-
- 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
- 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
Description
Claims (4)
- 入力信号を積分し、その結果を積分信号として出力する積分回路と、
非反転入力を接地し、前記積分信号を反転入力に入力し、両入力の電圧を比較して、パルス幅変調信号を出力する比較器と、
前記比較器から出力されるパルス幅変調信号を電力増幅するスイッチング回路と、
電力増幅されたパルス幅変調信号から、増幅された出力信号を生成するローパスフィルタと、
前記ローパスフィルタの出力を前記比較器の反転入力に帰還する第1帰還回路と、
前記ローパスフィルタの出力を前記積分回路の非反転入力に帰還する第2帰還回路と
を備えることを特徴とする自励式D級増幅器。 - 第1抵抗器を介して入力した入力信号を積分し、その結果を積分信号として出力する積分回路と、
非反転入力を接地し、前記積分信号を第2抵抗器を介して反転入力に入力し、両入力の電圧を比較して、パルス幅変調信号を出力する比較器と、
前記比較器から出力されるパルス幅変調信号を電力増幅するスイッチング回路と、
電力増幅されたパルス幅変調信号から、増幅された出力信号を生成するローパスフィルタと、
前記ローパスフィルタの出力を前記比較器の反転入力に帰還する第1帰還回路と、
前記ローパスフィルタの出力を前記積分回路の非反転入力に帰還する第2帰還回路と
を備えることを特徴とする自励式D級増幅器。 - 請求項1または2に記載の自励式D級増幅器において、
前記第2帰還回路は、抵抗器である
ことを特徴とする自励式D級増幅器。 - 請求項3に記載の自励式D級増幅器において、
前記第2帰還回路は、前記抵抗器に並列接続されたコンデンサを含む
ことを特徴とする自励式D級増幅器。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016062740A JP6699073B2 (ja) | 2016-03-25 | 2016-03-25 | 自励式d級増幅器 |
US15/468,329 US10038416B2 (en) | 2016-03-25 | 2017-03-24 | Self-oscillating class D amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016062740A JP6699073B2 (ja) | 2016-03-25 | 2016-03-25 | 自励式d級増幅器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2017175572A JP2017175572A (ja) | 2017-09-28 |
JP6699073B2 true JP6699073B2 (ja) | 2020-05-27 |
Family
ID=59896661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2016062740A Active JP6699073B2 (ja) | 2016-03-25 | 2016-03-25 | 自励式d級増幅器 |
Country Status (2)
Country | Link |
---|---|
US (1) | US10038416B2 (ja) |
JP (1) | JP6699073B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109863702B (zh) * | 2016-10-21 | 2022-09-23 | 昕诺飞控股有限公司 | 电流调制电路、驱动电路以及利用电流调制驱动照明负载的方法 |
EP3721555B1 (en) * | 2017-12-07 | 2023-09-06 | Purifi ApS | An amplifier with an at least second order filter in the control loop |
CN110518884B (zh) * | 2019-08-20 | 2021-03-09 | 上海交通大学 | 延时放大器 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59814Y2 (ja) * | 1977-04-22 | 1984-01-11 | ブライアン・ア−ネスト・アトウツド | D級増幅器 |
JPS5639606A (en) * | 1979-09-07 | 1981-04-15 | Matsushita Electric Ind Co Ltd | Self-excited type d-class amplifier |
US6249182B1 (en) * | 1998-11-18 | 2001-06-19 | Intersil Corporation | Class D amplifier with bandwidth independent of load impedance |
JP3941443B2 (ja) * | 2001-09-27 | 2007-07-04 | ヤマハ株式会社 | 自走式pwm増幅器 |
US7221216B2 (en) * | 2004-05-18 | 2007-05-22 | Nphysics, Inc. | Self-oscillating switching amplifier |
JP2006066998A (ja) * | 2004-08-24 | 2006-03-09 | Flying Mole Corp | 帰還回路 |
US7538611B2 (en) | 2005-03-07 | 2009-05-26 | Monolithic Power Systems, Inc. | Audio amplifier with high power and high efficiency |
US7498781B2 (en) * | 2006-04-07 | 2009-03-03 | L&L Engineering Llc | Methods and systems for disturbance rejection in DC-to-DC converters |
JP2009060466A (ja) * | 2007-08-31 | 2009-03-19 | Kenwood Corp | D級増幅装置 |
JP2013236208A (ja) * | 2012-05-08 | 2013-11-21 | Yamaha Corp | D級パワーアンプおよびシステム |
JP6365101B2 (ja) * | 2014-08-12 | 2018-08-01 | セイコーエプソン株式会社 | 液体吐出装置およびヘッドユニット |
-
2016
- 2016-03-25 JP JP2016062740A patent/JP6699073B2/ja active Active
-
2017
- 2017-03-24 US US15/468,329 patent/US10038416B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20170279421A1 (en) | 2017-09-28 |
JP2017175572A (ja) | 2017-09-28 |
US10038416B2 (en) | 2018-07-31 |
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