BR0010246A - Aparelho ativador de transdutor - Google Patents
Aparelho ativador de transdutorInfo
- 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
Links
- 239000012190 activator Substances 0.000 title 1
- 230000003213 activating effect Effects 0.000 abstract 2
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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
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.
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 (6)
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 |
CN115516875A (zh) * | 2020-06-15 | 2022-12-23 | 德州仪器公司 | 用以驱动电容性负载的具有过电流预测的控制电路 |
Family Cites Families (6)
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 |
-
1999
- 1999-05-19 GB GBGB9911505.7A patent/GB9911505D0/en not_active Ceased
-
2000
- 2000-05-16 CN CN 00807640 patent/CN1350767A/zh active Pending
- 2000-05-16 JP JP2000619964A patent/JP2003500992A/ja active Pending
- 2000-05-16 WO PCT/GB2000/001798 patent/WO2000072627A2/en not_active Application Discontinuation
- 2000-05-16 EP EP00931367A patent/EP1179286A2/en not_active Withdrawn
- 2000-05-16 BR BR0010246-6A patent/BR0010246A/pt not_active Application Discontinuation
- 2000-05-16 AU AU49328/00A patent/AU4932800A/en not_active Abandoned
- 2000-05-24 TW TW89109991A patent/TW502549B/zh active
Also Published As
Publication number | Publication date |
---|---|
TW502549B (en) | 2002-09-11 |
WO2000072627A2 (en) | 2000-11-30 |
AU4932800A (en) | 2000-12-12 |
WO2000072627A3 (en) | 2001-03-08 |
JP2003500992A (ja) | 2003-01-07 |
EP1179286A2 (en) | 2002-02-13 |
GB9911505D0 (en) | 1999-07-14 |
CN1350767A (zh) | 2002-05-22 |
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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 |