BR0010246A - Aparelho ativador de transdutor - Google Patents

Aparelho ativador de transdutor

Info

Publication number
BR0010246A
BR0010246A BR0010246-6A BR0010246A BR0010246A BR 0010246 A BR0010246 A BR 0010246A BR 0010246 A BR0010246 A BR 0010246A BR 0010246 A BR0010246 A BR 0010246A
Authority
BR
Brazil
Prior art keywords
transducer
inductor
activating
transducer activator
activator
Prior art date
Application number
BR0010246-6A
Other languages
English (en)
Inventor
Henry Azima
David Gamble
Original Assignee
New Transducers Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by New Transducers Ltd filed Critical New Transducers Ltd
Publication of BR0010246A publication Critical patent/BR0010246A/pt

Links

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
    • H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Electronic Switches (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Patente de Invenção: "APARELHO ATIVADOR DE TRANSDUTOR". é descrito um aparelho e método para ativar um transdutor capacitivo. Uma fonte de alimentação de comutação (Classe D) tem um estágio de saída de comutação (21) alimentando através de um indutor (25) o transdutor (27). Em vez de usar realimentação de tensão, um sensor (23) mede a corrente através do indutor e alimenta a mesma de retorno como realimentação negativa.
BR0010246-6A 1999-05-19 2000-05-16 Aparelho ativador de transdutor BR0010246A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9911505.7A GB9911505D0 (en) 1999-05-19 1999-05-19 Transducer driver
PCT/GB2000/001798 WO2000072627A2 (en) 1999-05-19 2000-05-16 Transducer driver

Publications (1)

Publication Number Publication Date
BR0010246A true BR0010246A (pt) 2002-02-19

Family

ID=10853652

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0010246-6A BR0010246A (pt) 1999-05-19 2000-05-16 Aparelho ativador de transdutor

Country Status (8)

Country Link
EP (1) EP1179286A2 (pt)
JP (1) JP2003500992A (pt)
CN (1) CN1350767A (pt)
AU (1) AU4932800A (pt)
BR (1) BR0010246A (pt)
GB (1) GB9911505D0 (pt)
TW (1) TW502549B (pt)
WO (1) WO2000072627A2 (pt)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0108076D0 (en) * 2001-03-30 2001-05-23 1 Ltd Capacitive power driver circuit
JP3928728B2 (ja) * 2003-09-19 2007-06-13 ソニー株式会社 デジタルアンプ
US7221227B2 (en) * 2005-06-06 2007-05-22 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Methods and apparatus for reducing output current oscillations of a driver provided with circuitry that senses and responds to excessive current draws of an output stage of the driver
JP4793174B2 (ja) * 2005-11-25 2011-10-12 セイコーエプソン株式会社 静電型トランスデューサ、回路定数の設定方法
JP6186135B2 (ja) * 2013-02-26 2017-08-23 京セラ株式会社 Ｄ級アンプおよび電子機器
WO2021253181A1 (en) * 2020-06-15 2021-12-23 Texas Instruments Incorporated Control circuit with overcurrent prediction to drive capacitive load
JP2024033556A (ja) * 2022-08-30 2024-03-13 クレバ株式会社 ヘッドフォン用の圧電振動板の駆動回路と、この駆動回路を備えたヘッドフォンの駆動ユニット

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092610A (en) * 1977-02-17 1978-05-30 Raytheon Company Modulated carrier amplifying system
US4439738A (en) * 1981-11-12 1984-03-27 Honeywell Inc. Class D pulse width modulated amplifier
US4628275A (en) * 1985-07-29 1986-12-09 Rockwell International Corporation Efficient power amplifier for high capacitive devices
FR2726138A1 (fr) * 1994-10-19 1996-04-26 Philips Composants Etage amplificateur de puissance delivrant un signal rectangulaire d'amplitude controlee
GB2314474B (en) * 1996-06-21 2001-03-07 Univ Bristol Low power audio device
JP2000511746A (ja) * 1997-04-07 2000-09-05 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ ブリッジド駆動増幅器及び通信デバイス

Also Published As

Publication number Publication date
WO2000072627A2 (en) 2000-11-30
TW502549B (en) 2002-09-11
JP2003500992A (ja) 2003-01-07
WO2000072627A3 (en) 2001-03-08
CN1350767A (zh) 2002-05-22
EP1179286A2 (en) 2002-02-13
AU4932800A (en) 2000-12-12
GB9911505D0 (en) 1999-07-14

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11Y Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired