JP4732021B2 - 高忠実度で高出力の切り替え式増幅器 - Google Patents

高忠実度で高出力の切り替え式増幅器 Download PDF

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Publication number
JP4732021B2
JP4732021B2 JP2005173542A JP2005173542A JP4732021B2 JP 4732021 B2 JP4732021 B2 JP 4732021B2 JP 2005173542 A JP2005173542 A JP 2005173542A JP 2005173542 A JP2005173542 A JP 2005173542A JP 4732021 B2 JP4732021 B2 JP 4732021B2
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Japan
Prior art keywords
amplifier
gradient
voltage
bridge
bridge amplifier
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Expired - Fee Related
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JP2005173542A
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English (en)
Japanese (ja)
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JP2006000645A5 (cg-RX-API-DMAC7.html
JP2006000645A (ja
Inventor
ホァン・アントニオ・サベイト
リチャード・エス・ツァン
ルイス・ホセ・ガルセス
ポール・マイケル・スツェスニー
チーミン・リー
ウィリアム・フレドリック・ワース
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General Electric Co
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General Electric Co
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
    • G01R33/3852—Gradient amplifiers; means for controlling the application of a gradient magnetic field to the sample, e.g. a gradient signal synthesizer
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0277—Selecting one or more amplifiers from a plurality of 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
    • H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several 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
    • 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
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Amplifiers (AREA)
JP2005173542A 2004-06-15 2005-06-14 高忠実度で高出力の切り替え式増幅器 Expired - Fee Related JP4732021B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/867,598 US7116166B2 (en) 2004-06-15 2004-06-15 High fidelity, high power switched amplifier
US10/867,598 2004-06-15

Publications (3)

Publication Number Publication Date
JP2006000645A JP2006000645A (ja) 2006-01-05
JP2006000645A5 JP2006000645A5 (cg-RX-API-DMAC7.html) 2008-07-31
JP4732021B2 true JP4732021B2 (ja) 2011-07-27

Family

ID=35459875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005173542A Expired - Fee Related JP4732021B2 (ja) 2004-06-15 2005-06-14 高忠実度で高出力の切り替え式増幅器

Country Status (4)

Country Link
US (1) US7116166B2 (cg-RX-API-DMAC7.html)
JP (1) JP4732021B2 (cg-RX-API-DMAC7.html)
DE (1) DE102005027628A1 (cg-RX-API-DMAC7.html)
NL (1) NL1029240C2 (cg-RX-API-DMAC7.html)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7253625B2 (en) * 2003-02-03 2007-08-07 Koninklijke Philips Electronics N.V. Precision gradient amplifier with multiple output voltage levels
GB2441572B (en) * 2006-09-05 2009-01-28 Stream Technology Ltd M Switching amplifier
EP2099127B1 (de) * 2008-03-05 2014-08-13 Ampegon AG Hochspannungsmodulator mit Transformator
EP2304455B1 (en) 2008-07-11 2019-03-06 Koninklijke Philips N.V. Digital amplifier with feedforward and feedback control
EP2234237A1 (en) * 2009-03-26 2010-09-29 ABB Research Ltd. Method for controlling single-phase DC/AC converters and converter arrangement
EP2234263A1 (en) 2009-03-27 2010-09-29 Koninklijke Philips Electronics N.V. A power supply, method, and computer program product for supplying electrical power to a load
US8760164B2 (en) * 2010-01-29 2014-06-24 General Electric Company Magnetic resonant imaging gradient driver architecture
EP2583114B1 (en) * 2010-06-17 2015-11-04 Koninklijke Philips N.V. Gradient coil power supply and magnetic resonance imaging system
DE112011104465T5 (de) 2010-12-20 2014-02-06 Philips Intellectual Property & Standards Gmbh Verfahren und Digitalverstärkersystem zum Betrieb eines MRI-Gradientenmagnetsystems
US8502539B2 (en) 2011-03-31 2013-08-06 General Electric Company Gradient amplifier system
US9013187B2 (en) * 2011-06-16 2015-04-21 General Electric Company Balanced mixer for MRI system with a hub, intermediate frequency, oscillator, and pre-amp circuitry coupled together
WO2013046099A1 (en) 2011-09-27 2013-04-04 Koninklijke Philips Electronics N.V. Gradient amplifier with compensation for dead time and forward voltage
CN103176150B (zh) 2011-12-21 2015-08-26 通用电气公司 梯度放大器系统及其控制方法
CN103222867B (zh) * 2012-01-31 2016-12-07 Ge医疗系统环球技术有限公司 体部/头部线圈切换方法、功率放大器组件和mri系统
RU2626026C2 (ru) * 2012-07-25 2017-07-21 Конинклейке Филипс Н.В. Градиентный усилитель mri, работающий при различных скоростях нарастания
US9389288B2 (en) 2012-09-14 2016-07-12 General Electric Company System and method for maintaining soft switching condition in a gradient coil driver circuit
KR101491658B1 (ko) * 2013-04-25 2015-02-09 주식회사 피에스텍 스위칭 증폭기 장치 및 그 제어 방법
NL2011648C2 (en) 2013-10-18 2015-04-23 Prodrive B V Switched power converter.
EP2910965A1 (en) * 2014-02-19 2015-08-26 Albert-Ludwigs-Universität Freiburg Multi-channel switching system for MRI matrix gradient coils
DE102015214925B4 (de) * 2014-09-11 2019-06-06 Siemens Healthcare Gmbh Verfahren zum Betrieb einer Magnetresonanzeinrichtung und Magnetresonanzeinrichtung
CN105591537B (zh) * 2014-10-28 2019-02-22 通用电气公司 梯度放大器、开关放大器及其操作方法
US10033263B2 (en) * 2015-06-26 2018-07-24 Board Of Trustees Of Michigan State University System and method for optimizing fundamental frequency modulation for a cascaded multilevel inverter
US9807863B1 (en) * 2016-06-09 2017-10-31 Advanced Energy Industries, Inc. Switching amplifier
CN108173417B (zh) * 2018-01-11 2020-06-16 台达电子企业管理（上海）有限公司 梯度电源驱动级电路、梯度电源系统及其控制方法
EP3550319A1 (en) * 2018-04-05 2019-10-09 Koninklijke Philips N.V. Emulation mode for mri
CN109001659A (zh) * 2018-06-06 2018-12-14 上海东软医疗科技有限公司 一种梯度放大器及核磁共振成像设备

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581212A (en) * 1969-07-31 1971-05-25 Gen Electric Fast response stepped-wave switching power converter circuit
US5270657A (en) * 1992-03-23 1993-12-14 General Electric Company Split gradient amplifier for an MRI system
JPH07313489A (ja) * 1994-05-30 1995-12-05 Toshiba Corp 傾斜磁場電源装置
US5663647A (en) * 1995-12-29 1997-09-02 General Electric Company Switching gradient amplifier with adjustable DC bus voltage
DE19709767C1 (de) * 1997-03-10 1998-04-23 Siemens Ag Verfahren zum Ansteuern mehrerer Schaltendstufen, Ansteuereinrichtung und Leistungsverstärker
JPH10314140A (ja) * 1997-05-15 1998-12-02 Hitachi Medical Corp 磁気共鳴イメージング装置
DE19812069B4 (de) 1998-03-19 2005-07-07 Siemens Ag Leistungsverstärker und Verfahren zum Erzeugen von Steuersignalen für einen Leistungsverstärker
DE19824767C2 (de) * 1998-06-03 2000-05-18 Siemens Ag Verfahren zum Erzeugen von Steuersignalen für einen Leistungsverstärker und Leistungsverstärker
US6031746A (en) 1998-09-04 2000-02-29 General Electric Company Switching amplifier for generating continuous arbitrary waveforms for magnetic resonance imaging coils
US6172558B1 (en) * 1999-09-02 2001-01-09 Siemens Aktiengesellschaft Switching amplifier and method for operating same
US6166602A (en) * 1999-09-27 2000-12-26 General Electric Company High-efficiency switching power amplifier
JP3499235B1 (ja) * 2002-08-28 2004-02-23 株式会社フライングモール スイッチング回路及びディジタル電力増幅器

Also Published As

Publication number Publication date
US20050275404A1 (en) 2005-12-15
JP2006000645A (ja) 2006-01-05
NL1029240A1 (nl) 2005-12-19
NL1029240C2 (nl) 2006-07-11
DE102005027628A1 (de) 2006-01-05
US7116166B2 (en) 2006-10-03

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